Machining method for radial high-precision small square holes of rotary part

The invention discloses a machining method for radial high-precision small square holes of a rotary part. The machining range is 0.3-3.0 mm, the machining thickness is less than 1.5 mm, the root Rmax is 0.08, and the radial coplanarity degree of the opposite holes is within 0.01 mm. According to the machining method for the radial high-precision small square holes of the rotary part, on the basis of machining the small square holes through traditional electric spark forming, the small square holes are machined roughly on an electric discharge machining machine tool through an EROWA fixture and a homemade electrode stand to reserve margins for finish machining; by using the characteristics and advantages of machining the workpiece through the EROWA fixture and slow speed wire cutting, slow speed wire cutting is added into the finish machining process for the small square holes, accordingly, the purpose that the radial coplanarity degree of the opposite holes is within 0.01 mm is achieved, and the small square