The utility model relates to a platform but height -adjusting's stator rolls off production line, but including the rotary device who is used for fixed stator, and set up but the rotary device below is used for rotating but rotary device's power device, but rotary device includes a rotating shell and fixes stator in the rotating shell is constituteed, power device includes base device and sets up the last power wheel of base device is constituteed, base device is in including fixed upper plate, bottom plate and setting played a supporting role's cylinder is constituteed between fixed upper plate and the bottom plate. The utility model discloses simple structure, easy and simple to handle, the level that can realize the stator rotate and the stator in the removal of vertical direction, alleviateed intensity of labour, provide very big facility for motor stator rolls off the production line, improved production efficiency effectively.