Wind power bearing ball is used in the bad environments. Its maintenance is inconvenience, and the alternating load suffers a large difference during the operation. The pressure that the single ball withstands changes too much, so requirements for the bearing capacity and impact toughness of steel balls are more stringent. It must be controlled strictly during the entire production process from raw materials to finished ball, in accordance with the technical requirements strictly. Reduce and avoid generating the ball grinding cracks, track the test to make a record, to meet the steel balls’ traceability requirements. In this way, the life of steel balls can meet the requirements of 20 years.