Supporting device facilitating dismounting and mounting of working roll bearing of rolling mill

The utility model relates to a supporting device convenient for disassembling and assembling a working roll bearing of a rolling mill, which comprises a working roll supporting platform and disassembling trolleys which are arranged on two sides of the working roll supporting platform and can move freely. The dismounting trolley comprises a trolley body, a lifting structure arranged on the upper side face of the trolley body and a bearing seat lifting platform connected to the lifting structure, two sets of longitudinal pulleys are arranged on the lower side face of the trolley body, and longitudinal sliding rails for the longitudinal pulleys to slide are arranged on the left side and the right side of the trolley body. Wheel plates are connected to the front end and the rear end of the longitudinal sliding rail, the number of the wheel plates is two, each wheel plate is provided with a set of transverse sliding wheels, and a transverse sliding rail for the transverse sliding wheels to roll is arranged on one