Process for reducing heat treatment retained austenite of long-service-life precision-grade cylindrical roller

The invention relates to a process for reducing heat treatment retained austenite of a long-life precision-grade cylindrical roller, which comprises the following steps: quenching the cylindrical roller after heat treatment, cooling to room temperature, immediately carrying out cold water treatment, carrying out cold treatment after cold water treatment, recovering to room temperature after cold treatment, and carrying out tempering treatment, cylindrical roller activation process treatment is carried out after cold water treatment and before cold treatment. The method has the advantages that in order to improve the cold treatment effect, after the cylindrical roller is quenched and subjected to cold water treatment, the standing time at room temperature does not exceed 25 minutes, so that the phenomenon that austenite is stabilized due to overlong standing time is avoided. In order to ensure the dimensional stability of the high-end precision bearing steel cylindrical roller, two-time cold treatment is carri