Rotary fixing platform for axle assembly

The invention belongs to the field of axle assembling equipment, and provides a rotary fixing platform for axle assembling, which comprises a rack system and a supporting system, the supporting system comprises a fixing platform, a composite supporting device and a composite driving device, the composite supporting device comprises two oppositely distributed supporting assemblies, and each supporting assembly comprises a semicircular rolling frame. The rolling frame and the rolling frame of the other supporting assembly are distributed in a staggered mode, a clamping plate set used for supporting the middle of the axle and a brake used for supporting the shaft end of the axle are arranged on the rolling frame, the composite driving device comprises a transmission frame connected with the rolling frame, and the composite driving device further comprises a linear driving assembly and a rotary driving assembly which are connected with the transmission frame. The linear driving assembly is used for driving the ro