Abstract: Combined with the production requirements, the contact fatigue testing machine for bearing rollers was developed. The test machine adopts three-point contact transmission and loading mode. The computer automatically controls the hydraulic proportional loading and frequency conversion speed regulation. It can test different diameter rollers between 15~30 mm. And the maximum speed is 15 000 r/min with testing load between 2~25 kN. Two kinds of rollers with different curve types are selected for experiments. By analyzing data for 100 minutes and 100 hours, the scientificalness of the testing machine is verified, providing new experimental means for the next roller design and process improvement.