The invention relates to a universal axle automatic 
test bench, which is used for axle performance detection, and is provided with an axle placing area and a test transmission area, wherein the axle placing area comprises an axle support for placing an axle and an axle body lifting 
assembly, the axle support is driven by the axle body lifting 
assembly to move up and down, the test transmission area comprises a running motor, a transmission shaft 
system, an adjusting bottom plate, a rear end lifting adjusting mechanism and an automatic 
butt joint assembly, the adjusting bottom plate adjusts an inclination angle through the rear end lifting adjusting mechanism, the transmission shaft 
system adjusts the inclination angle through the automatic 
butt joint assembly, and the transmission shaft 
system is driven by the running motor to rotate, and realizes the automatic 
butt joint with the axle through an elastic connecting piece. According to the invention, the 
test bench can be automatically adjusted according to different sizes and inclination angles of axles, so that the 
test bench truly simulates the loading posture of the axles, 
test data errors are reduced, automatic butt joint of a transmission shaft system and an axle input 
flange is achieved, and the maintenance cost is reduced.