Puller for dismounting oil pan

The invention discloses a puller for dismounting an oil pan. According to the puller for dismounting the oil pan, a bolt through hole is formed in the oil pan, the puller comprises a screw sleeve with external threads and a screw rod, the diameter of the external threads is larger than the inner diameter of the bolt through hole, the thread pitch of the external threads is equivalent to the plate thickness of the oil pan, the screw sleeve can be screwed into the bolt through hole and be relatively fixed with the bolt through hole, and the screw rod penetrates through the inner portion of the screw sleeve and is in threaded connection with the screw sleeve. According to the puller, the different external threads of the screw sleeve are designed according to the size of the bolt through hole of the pulled oil pan and the plate thickness of the oil pan, then different oil pans can be dismounted, the oil pan can be conveniently and fast separated from an air cylinder body, and the matching face of parts is not damaged.