The present invention belongs to the field of traditional Chinese medicine, and particularly relates to a composition for preventing and/or treating rheumatoid arthritis as well as a preparation method and an application thereof. The composition for preventing and/or treating rheumatoid arthritis is prepared from the following raw material components in parts by mass: 10 to 40 parts of Radix Salviae Miltiorrhizae, 15 to 120 parts of Rhizoma Dioscoreae Nipponicae, 15 to 60 parts of Radix Astragali, 5 to 30 parts of Radix Paeoniae Alba, 3 to 15 parts of Herba Ephedrae, 3 to 15 parts of Radix Aconiti Lateralis Preparata, 5 to 30 parts of Radix Morindae Officinalis, and 5 to 30 parts of Radix Glycyrrhizae Preparata. Clinical experiments have proved that the composition for preventing and/or treating rheumatoid arthritis according to the present invention can improve symptoms of ankle swelling and pain of patients, and control the levels of inflammation and disease progression, and has a potential effect of protecting bones. [0001] The present invention belongs to the field of traditional Chinese medicine, and particularly relates to a composition for preventing and/or treating rheumatoid arthritis as well as a preparation method and an application thereof.BACKGROUND ART[0002] Rheumatoid arthritis (RA) is a common autoimmune disease. Its pathological characteristics are manifested as synovial inflammation and synovial tissue proliferation of joints. Bone destruction, as an important feature of RA joint damage, mainly includes the damage and destruction of articular cartilages and bones. The problem of disability caused by bone destruction in RA patients in China is still severe, where a disability rate is up to 43.5% in the course of 5 to 10 years, and 90% in the course of 30 years. Bone destruction caused by the inflammatory hyperplasia of the synovial joints is a core pathological link of rheumatoid arthritis, so how to effectively block bone destruction and reduce the disability rate is a difficulty to be urgently overcome in the treatment of rheumatoid arthritis.[0003] Although Western medicine treatment regimens can effectively control pathogenetic conditions in the short term, they are still not completely effective in stabilizing the conditions in the long term, especially in stopping the imago!ogical progression (i.e., stopping a process of bone destruction). Disease-modifying antirheumatic dnigs (DMARDs) such as methotrexate (MTX) are first-line therapeutic dntgs for RA. Early, adequate and combined use of DMARDs is the key to improve the prognosis of RA. However, 40% of patients have no response to early induction remission regimens. In addition, DMARDs are greatly limited, even resisted by patients, in long-term clinical applications due to their side effects such as gastrointestinal symptoms, bone marrow suppression, hepatotoxicity, nephrotoxicity, infections, tumors and autonomic neuropathy, and poor tolerability. Although new DMARDs such as biologies continue to make progress, there are still problems such as rapid short-term efficacy, unstable long-term efficacy, easy recurrence of patients' conditions, and incompletely clear safety due to a single -target effect, and high treatment price of biologies in China has brought a heavy economic burden to individual patients and society. At present, DMARDs, including the biologies, cannot effectively block or inhibit the pathological process of articular bone destruction in RA patients, resulting in a continuous progression of imagological changes under treatment.[0004] RA falls under a category of "arthralgia syndromes" in traditional Chinese medicine. Classic prescriptions such as Radix Astragali and Ramulus Cinnamomi Five-drug Decoction (including Radix Astragali, Ramulus Cinnamomi, Paeonia Lactitlora, Rhizoma Zingiberis Recens and Fructus Jujubae) or a Ramulus Cinnamomi, Paeonia Lactiflora and Rhizoma Anemarrhenae Decoction (including Ramulus Cinnamomi, Paeonia Lactiflora, Radix Glycyrrhizae, Herba Ephedrae, Rhizoma Zingiberis Recens, Rhizoma Atractylodis Macrocephalae, Rhizoma Anemarrhenae, Radix Saposhnikoviae and Radix Aconiti Lateralis Preparata) have been used to treat rheumatoid arthritis, but their treatment effects are not very satisfactory'. In addition, the Chinese patent application with publication No. CN108578606A discloses a traditional Chinese medicine preparation for the treatment of rheumatoid arthritis, which consists of 35 parts of Radix Astragali, 15 parts of Ramulus Cinnamomi, 25 parts of stir-fried Radix Paeoniae Alba, 10 parts of Radix Aconiti Lateralis Preparata, 15 parts of Radix Angelicae Sinensis, 25 parts of Semen Coicis, 15 parts of Radix Saposhnikoviae, 15 parts of Radix Gentianae Macrophyllae, 10 parts of Rhizoma Et Radix Notopterygii, 10 parts of Rhizoma Chuanxiong, 15 parts of Rhizoma Atractylodis, and 15 parts of Radix Glycyrrhizae, and has a certain therapeutic effect on rheumatoid arthritis, but whether it can block or inhibit the pathological process of joint bone destruction in RA patients still needs to be further explored.SUMMARY OF THE INVENTION[0005] According to an aspect of the present invention, a composition for preventing and/or treating rheumatoid arthritis is provided. The composition is prepared from the following raw' material components in parts by mass: 10 to 40 parts of Radix Salviae Miltiorrhizae, 15 to 120 parts of Rhizoma Dioscoreae Nipponicae, 15 to 60 parts of Radix Astragali, 5 to 30 parts of Radix Paeoniae Alba, 3 to 15 parts of Herba Ephedrae, 3 to 15 parts of Radix Aconiti Lateralis Preparata, 5 to 30 parts of Radix Morindae Officinalis, and 5 to 30 parts of Radix Glycyrrhizae Preparata.[0006] The traditional Chinese medicine composition of the present invention is used for activating blood circulation and tonifying kidney, and expelling cold and dispelling wind and dampness as a therapeutic method, mainly for patients with syndromes of cold dampness and stasis, and is specifically described as follows.[0007] Radix Salviae Miltiorrhizae and Rhizoma Dioscoreae Nipponicae are used as sovereign drugs. Radix Salviae Miltiorrhizae has the efficacy of activating blood circulation and remove stasis, and removing blood stasis to engender the new blood. Rhizoma Dioscoreae Nipponicae has the efficacy of activating blood circulation and removing meridian obstruction, and dispelling wind and eliminating dampness.[0008] Radix Astragali, Radix Aconiti Lateralis Preparata and Radix Morindae Officinalis are used as minister drugs. Radix Astragali assists the sovereign drugs in strengthening body resistance, and strengthening the effects of replenishing Qi and activating blood circulation, and has the efficacy of further strengthening body resistance when used together with Rhizoma Dioscoreae Nipponicae. Radix Morindae Officinalis is distributed to liver and kidney meridians, has the efficacy of nourishing liver and kidney, and strengthening the bones and muscles, and achieves double effects when used together with the sovereign drugs and Radix Astragali. Radix Aconiti Lateralis Preparata has the efficacy of expelling wind and cold and relieving pain, and assists the sovereign drugs in removing meridian obstruction.[0009] Radix Paeoniae Alba and Herba Ephedrae are used as assistant drugs. Radix Paeoniae Alba is used for assisting Radix Astragali to achieve the efficacy of nourishing blood and liver, and balancing the dryness of Radix Aconiti Lateralis Preparata, Herba. Ephedrae is used together with the sovereign drugs to assist in dispelling wind-dampness toxic evil, and relieving pain.[0010] Radix Glycyrrhizae Preparata is used as a courier drug, and is used for coordinating the drug actions of the traditional Chinese medicine composition,[0011] In this prescription:[0012] Radix Salviae Miltiorrhizae is dried roots and rhizomes of Salvia miltiorrhiza Bunge, that is a plant of the Labiate, Radix Salviae Miltiorrhizae is bitter in flavor and little cold in nature, is distributed to heart and liver meridians, and has the efficacy of removing stasis and relieving pain, activating blood circulation and removing meridian obstruction, and clearing away the heart-fire and eliminating vexation.[0013] Rhizoma Dioscoreae Nipponicae is medicinal parts, i.e., rhizomatous roots, of Dioscorea nipponica Makino that is a plant of the Dioscoreaceae. Rhizoma Dioscoreae Nipponicae is bitter in flavor and bland in nature, and has the efficacy of relaxing muscles and acti vating collaterals, and dispelling wind and relieving pain.[0014] Radix Astragali is dried roots of Astragalus membranaceus (Fisch.) Bge. var. mongholicus (Bge.) Hsiao or Astragalus membranaceus (Fisch.) Bge. that is a plant of the Legume. Radix Astragali is sweet in flavor and warm in nature, is distributed to lung and spleen meridians, and has the efficacy of invigorating Qi for strengthening superficies, promoting diuresis to expel toxins and pus, and healing sores and prompting tissue regeneration.[0015] Radix Paeoniae Alba is dried roots of Paeonia lactiflora Pall, that is a plant of the Ranunculaceae. Radix Paeoniae Alba is bitter, sour in flavor and little cold in nature, is distributed to liver and spleen meridians, and has the efficacy of calming the liver and relieving pain, nourishing blood and regulating meridians, and retaining Yin and constraining sweating.[0016] Herba Ephedrae is dried herbaceous stems of Ephedra sinica Stapf, Ephedra intermedia Schrenk et C. A. Mey., or Ephedra equisetina Bge. that is a plant of the Ephedraceae. Herba Ephedrae is pungent, little bitter in flavor and warm in nature, is distributed to lung and bladder meridians, and has the efficacy of inducing sweating and dissipating cold, freeing lung to relieve asthma, and inducing diuresis to alleviate edema.[0017] Radix Aconiti Lateralis Preparata is a processed product of daughter roots of Aconitum carmichaeli Debx. that is a plant of the Ranunculaceae. Radix Aconiti Lateralis Preparata is pungent, sweet in flavor, great hot in nature and poisonous, is distributed to heart, kidney and spleen meridians, and has the efficacy of recuperating depleted Yang and rescuing patient from collapse, supplementing fire to support Yang, and expelling wind, cold, dampness and evil.[0018] Radix Morindae Officinalis is dried roots of Morinda officinalis How that is a plant of the Rubiaceae. Radix Morindae Officinalis is sweet, pungent in flavor and little warm in nature, is distributed to kidney and liver meridians, and has the efficacy of tonifying kidney Yang, strengthening muscles and bones, and expelling wind-dampness.[0019] Radix Glycyrrhizae Preparata is a perennial herb of the Leguminosae and Glycyrrhiza, and is prepared by processing medicinal parts, i.e., roots and rhizomes, of Radix Glycyrrhizae Preparata with honey and boiling w'ater. Radix Glycyrrhizae Preparata is sweet in flavor and bland in nature, has mild properties that allow' it to be an upfloating medicinal and a downsinking medicinal, and is distributed to heart, lung, spleen and stomach meridians. Radix Glycyrrhizae Preparata can tonify middle-Jiao and Qi, and also facilitates harmonizing the properties of various drugs.[0020] In some embodiments, the composition for preventing and/or treating rheumatoid arthritis is prepared from the following raw material components in parts by mass: 30 parts of Radix Salviae Miltiorrhizae, 30 parts of Rhizoma Dioscoreae Nipponicae, 30 parts of Radix Astragali, 10 parts of Radix Paeoniae Alba, 6 parts of Herba Ephedrae, 10 parts of Radix Aconiti Lateralis Preparata, 10 parts of Radix Morindae Officinalis, and 15 parts of Radix Glycyrrhizae Preparata.[0021] According to another aspect of the present invention, a method for preparing the composition for preventing and/or treating rheumatoid arthritis is provided. The method includes: crushing, sieving and mixing the components respectively to obtain the composition for preventing and/or treating rheumatoid arthritis.[0022] According to another aspect of the present invention, an application of the composition for preventing and/or treating rheumatoid arthritis in the preparation of a drug for preventing and/or treating rheumatoid arthritis is provided. [0023] According to another aspect of the present invention, a traditional Chinese medicine preparation is provided, wherein the traditional Chinese medicine preparation uses the composition for preventing and/or treating rheumatoid arthritis as an effective constituent.[0024] hi some embodiments, the traditional Chinese medicine preparation further includes the medically acceptable accessory. Preferably, the accessory is at least one of a sustained-release agent, an excipient, a filler, a binder, a wetting agent, a disintegrant, an absorption promoter, an adsorption carrier, a surfactant and a lubricant. The accessories selected in the present invention are conventional accessories in the field of traditional Chinese medicine production. For example, the sustained-release agent and the excipient may be water. The filler may be starch and sucrose. The binder may be a cellulose derivative, alginate, gelatin and polyvinylpyrrolidone. The wetting agent may be glycerol. The disintegrant may be agar, calcium carbonate and sodium bicarbonate. The absorption promoter may be a quaternary ammonium compound. The adsorption carrier may-be kaolin and bentonite. The surfactant may be cetyl alcohol. The lubricant may be talc, calcium/magnesium stearate, or polyethylene glycol. In addition, a flavoring agent, a sweetener or other accessories may also be added.[0025] A dosage form of the traditional Chinese medicine preparation according to the present invention may be a decoction, a tablet, a capsule, a pill, a powder, a granule, a syrup or other conventional Chinese medicine dosage forms.[0026] According to another aspect of the present invention, an application of the traditional Chinese medicine preparation in the preparation of a drug for preventing and/or treating rheumatoid arthritis is provided.[0027] CIA rat model experiments have proved that the composition for preventing and/or treating rheumatoid arthritis according to the present invention can obviously alleviate a ankle swelling degree of CIA rats, X-ray shows that the composition can improve bone destruction, and a pathological section shows that the composition has good effects of inhibiting synovial tissue proliferation, reducing inflammatory cell infiltration and delaying bone and cartilage destruction. The composition can significantly reduce expression levels of inflammatory cytokines TNF-α and IL-Τβ in serums of the CIA rats. The composition has the efficacy of improving symptoms, protecting bones and resisting inflammation on the CIA rats in a rheumatoid artliritis animal model, and has no toxicity on the rats.[0028] Clinical trials have proved that the composition for preventing and/or treating rheumatoid arthritis according to the present invention can improve symptoms and alleviate inflammation with few adverse effects, and has a potential effect of protecting bones.