A method for manufacturing a nonmagnetic water-cooled microwave ablation needle, said needle comprising the following elements: a zirconia penetrator, a pole shank, a coaxial cable, a water plugging shaft, a water delivery pipe, and a needle bar, and said method comprising the following steps: S1: removing an outer conductor from head and tail ends of the coaxial cable to expose a dielectric layer, and then removing a front segment of the exposed dielectric layer to expose an inner conductor, wherein the outer conductor and inner conductor of the coaxial cable are both made of copper; S2: deforming and firmly connecting a copper pole shank and the inner conductor of the coaxial cable in a cold-pressing manner, wherein after being connected, the pole shank and the coaxial cable have the same center; S3: coating an outer surface of the pole shank and an inner hole of the zirconia penetrator with a ceramic adhesive, inserting the pole shank into the inner hole of the zirconia penetrator, and performing dry bonding; S4: sheathing a copper water plugging shaft and the water delivery pipe on the coaxial cable in sequence, wherein a head of the water plugging shaft abuts against a rear end face of the zirconia penetrator, and a tail of the water plugging shaft is welded to the outer conductor of the coaxial cable in a sealing manner, sheathing a front end of the water delivery pipe on an outer circle of a lifting shoulder of the water plugging shaft, and fixing the front end of the water delivery pipe to the water plugging shaft in a welding manner, wherein there should be no dry joint; S5: sheathing a front end of a copper needle bar on an outer circle of the zirconia penetrator, fixing the needle bar to the zirconia penetrator and the water plugging shaft by using an epoxy resin adhesive, and performing rivet connection; S6: welding a copper radio frequency coaxial connector to a tail of the coaxial cable; and S7: mounting a water inlet sleeve, a water inlet chamber, a water outlet chamber, a water nozzle, and a handle. S1: removing an outer conductor from head and tail ends of the coaxial cable to expose a dielectric layer, and then removing a front segment of the exposed dielectric layer to expose an inner conductor, wherein the outer conductor and inner conductor of the coaxial cable are both made of copper; S2: deforming and firmly connecting a copper pole shank and the inner conductor of the coaxial cable in a cold-pressing manner, wherein after being connected, the pole shank and the coaxial cable have the same center; S3: coating an outer surface of the pole shank and an inner hole of the zirconia penetrator with a ceramic adhesive, inserting the pole shank into the inner hole of the zirconia penetrator, and performing dry bonding; S4: sheathing a copper water plugging shaft and the water delivery pipe on the coaxial cable in sequence, wherein a head of the water plugging shaft abuts against a rear end face of the zirconia penetrator, and a tail of the water plugging shaft is welded to the outer conductor of the coaxial cable in a sealing manner, sheathing a front end of the water delivery pipe on an outer circle of a lifting shoulder of the water plugging shaft, and fixing the front end of the water delivery pipe to the water plugging shaft in a welding manner, wherein there should be no dry joint; S5: sheathing a front end of a copper needle bar on an outer circle of the zirconia penetrator, fixing the needle bar to the zirconia penetrator and the water plugging shaft by using an epoxy resin adhesive, and performing rivet connection; S6: welding a copper radio frequency coaxial connector to a tail of the coaxial cable; and S7: mounting a water inlet sleeve, a water inlet chamber, a water outlet chamber, a water nozzle, and a handle.