The invention relates to the technical field of motor stator core electro-welding control, particularly to a stator core electro-welding end plate self-adapting hydraulic device. The stator core electro-welding end plate self-adapting hydraulic device comprises a main case, an electronic control hydraulic machine arranged inside the main case, and an electro-welding gun arranged above the main case; the upper end of the main case is fixedly connected with a worktable surface. According to the stator core electro-welding end plate self-adapting hydraulic device, a structure-adjustable cross adjusting plate is fixed onto the upper surface of a rotating table; the upper extending rod of the electronic control hydraulic machine is threadedly connected with a lifting sleeve, which is controlled through the cross adjusting plate, a DC (direct current) motor controls the rotating table to rotate and meanwhile drives an entire end plate to move up and down so that welding can be greatly facilitated, the welding efficiency can be improved, and adjustment and operation can be simple; meanwhile, the limiting plat is provided with electronic control switches which control lifting of the electronic control hydraulic machine as well as forward and reverse rotation of the DC motor, so that the stator core electro-welding end plate self-adapting hydraulic device can automatic control processes according to the dimension of the end plate, save full-process manual operation and greatly reduce the working intensity.