High-precision machining method of double symmetric key slots of water pump shafting component

The invention provides a high-precision machining method of double symmetric key slots of a water pump shafting component, and is simple and high in machining precision. The method is characterized in that the method is specifically as follows: firstly, locating both ends of a shafting component to be machined by V-shaped irons; then fixedly mounting a parallel reference meter at one end of the shafting component to be machined by a bolt; aligning the parallel reference meter by a dial indicator; next, machining a first key slot; after the machining of the first key slot is finished, overturning the shafting component to be machined together with the parallel reference meter by 180 degrees; aligning the parallel reference meter again by the dial indicator; and at last, machining a second symmetric key slot.