Speed reducer performance test system

The utility model refers to a test system, especially to a speed reducer performance test system used for speed reducer performance test. The speed reducer performance test system comprises a controller in connection with an input power source and a test mechanism. The test mechanism comprises an input torque rotating speed test sensor and an output torque rotating speed test sensor. One side end of the input torque rotating speed test sensor is in connection with a prime mover tester, and the other side end of the input torque rotating speed test sensor is in connection with an input coupler of a speed reducer to be tested. One side end of the output torque rotating speed test sensor is in connection with a magnetic powder brake tester, and the other side end of the output torque rotating speed test sensor is in connection with an output coupler of the speed reducer to be tested. The input coupler and the output coupler of the speed reducer to be tested are respectively in connection with the speed reducer to be tested. The speed reducer performance test system has the characteristics of a compact structure, high detection precision, a large detection scope and convenience in operation.