Processing method of medical nickel-titanium pipe

The invention discloses a machining method for a medical nickel-titanium pipe. The machining method comprises the following steps that S1, a nickel-titanium bar blank is prepared; s2, perforating and cutting the nickel-titanium rod blank prepared in the step S1 to prepare a nickel-titanium pipe blank; s3, after the nickel-titanium pipe blank prepared in the step S2 penetrates through a hard core rod, cold deformation drawing treatment is conducted one time or multiple times; s4, the nickel-titanium pipe blank subjected to cold deformation drawing treatment in the step S3 and a hard core rod are subjected to annealing treatment together; s5, the step S3 and the step S4 are circulated till the nickel-titanium pipe blank reaches the size of the medical nickel-titanium pipe needing to be prepared; and finally, the nickel-titanium pipe blank is subjected to straightening heat treatment and hard core rod removing operation, and then subsequent surface treatment is conducted, so that a finished medical nickel-titani