A method for producing a self-enhancement plastic profile, the self-enhancement plastic profile comprising a plastic profile substrate resin and at least one enhancement bar integrally formed with the plastic profile substrate to increase the intensity of the profile, wherein the enhancement bar is arranged inside the profile substrate; the enhancement bar is a PBT resin containing fiberglass; and the self-enhancement plastic profile is made by co-extrusion of the substrate resin and the PBT resin containing fiberglass, wherein the composition of the substrate resin is: raw material name mass fraction PVC 100 Stabilizer 3-8 Modifier 4-11 Stain 3-6 Filler 5-10 processing agent 1-4 Pigment 0.015-0.045 wherein, the stabilizer is a lead based stabilizer, a calcium/zinc stabilizer or an organic tin stabilizer; the modifier is a CPE modifier or an acrylic ester modifier; the stain is titanium dioxide; the filler is kaolin, wollastonite, calcium carbonate or talc powder; the processing agent is acrylic ester; and the pigment is ultramarine or phthalocyanine blue; wherein the PBT resin containing fiberglass is made by blending the fiberglass with the PBT material, wherein the raw materials and their proportions are: raw material name mass ratio (%) PBT material 45-75 enhanced fiberglass 25-55 wherein the method for producing the self-enhancement plastic profile comprises: using an infrastructure comprising a main engine and an auxiliary engine vertically arranged to the main engine; the PVC profile is processed by the main engine; the enhancement bar of the PBT resin added with fiberglass is processed by the auxiliary engine; the raw materials are extruded by the main engine and the auxiliary engine simultaneously and the extrudate is pre-profiled, and subjected to cold cutting and sized; wherein the main engine is a double screw plastic extruder, wherein the inside of the extruder has six heating zones and an adapter, the heating temperatures of each heating zone being respectively that: zone I: 172-176°C, zone II: 175-180°C, zone III: 176-183°C, zone IV: 182-187°C, zone V: 184-190°C, zone VI: 172-176°C; wherein the temperature in the adapter of the main engine is 185-195°C; and wherein the rotating speed of an extrusion screw in the main engine is 7-9 rpm, and the rotating speed of a feeding screw is 18-25 rpm, and the torque of the extrusion screw is 32-39% of the maximum bearable torque of the extrusion screw, and the melting pressure is 310-330 bar; wherein the auxiliary engine is a single screw plastic extruder having three heating zones and an adapter, the heating temperatures of each heating zone being respectively: zone I: 220-240°C, zone II: 220-240°C, zone III: 220-240°C; wherein the temperature in the adapter of the auxiliary engine is 220-240°C; and wherein the auxiliary engine has two co-extrusion heads in total, wherein the heating temperature of the co-extrusion head I is 220-240°C, and the heating temperature of the co-extrusion head II is 220-240°C; temperature parameters of a die head of the infrastructure comprising four zones are: zone I of the die head: 185-200°C, zone II of the die head: 185-200°C, zone III of the die head: 185-200°C, and zone IV of the die head: 185-200°C.