Motor shutdown automatic brake test system

The invention relates to the technical field of motor performance test, in particular to a motor shutdown automatic brake test system which comprises an accompanying test motor. Quickly installing the adjusting device; a double-locking brake auxiliary mechanism; a multi-size shaft sleeve; a test machine; and a tested motor. The effect of connecting and testing outputs on motors of different models is achieved through the multi-size shaft sleeve and the standard clamping shaft, the multi-size shaft sleeve is locked through the double-locking brake auxiliary mechanism to achieve rapid braking of the output shaft of the motor, lubricating oil is sprayed to the surface of the shaft sleeve before rapid locking, speed reduction is conducted in advance, and the test efficiency is improved. Therefore, the problem that abrasion is large due to sudden hard braking of shaft sleeves of multiple sizes is avoided, dual-speed-reduction locking braking is achieved, braking stability and rapidity are improved, the effect of i