The invention discloses a machining process for a turntable bearing, and belongs to the technical field of bearing manufacturing. The machining process for the turntable bearing comprises the following steps of checking a forging blank, rough turning, finish turning, forming finish turning, bearing cone, superficial hardening, tempering after heat, gearing hobbing, gear milling, layout, drilling hole, rough grinding, fine grinding, quality testing, and antirust warehousing. The machining process for the turntable bearing solves the problems that an existing bearing machining process lacks thedetection of bearing self-quality, assembly precision, cleaning, and late oil coating during bearing production and assembly, the service life of the bearing is affected, and the machining process hashigh requirements for operators, so that the learning period is long.