Novel rack test system for speed reducer with differential mechanism and test method of novel rack test system

The invention discloses a novel rack test system for speed reducers with differential mechanisms and a test method thereof, and the system comprises a test rack, a first loading motor, a second loading motor, a first driving motor and a second driving motor. A first tested speed reducer and a second tested speed reducer are arranged left and right and are installed face to face, that is, an input shaft of the first tested speed reducer is in coupling connection with an input shaft of the second tested speed reducer, a first output shaft of the first tested speed reducer is connected with a driving motor I, and a second output shaft of the first tested speed reducer is connected with a driving motor II; a first output shaft of the second tested speed reducer is connected with a loading motor I, and a second output shaft of the second tested speed reducer is connected with a loading motor II; using of a high-speed motor or a speed raising box is avoided, the function of a high-speed rack is achieved, the cost i