Clamping mechanism for engine cylinder block

The embodiment of the utility model provides an engine cylinder block clamping mechanism. The engine cylinder block clamping mechanism comprises a mounting frame; at least two groups of clamping cylinders and at least two groups of positioning pin shafts, wherein the at least two groups of clamping cylinders are mounted on different sides of the mounting frame; at least two groups of positioning pin shafts are mounted at the bottom of the mounting frame, and the positioning pin shafts correspond to positioning pin holes in the engine cylinder body; wherein the positioning pin shaft is matched with the positioning pin hole to position the clamping cylinder and the engine cylinder body, and the clamping cylinder clamps and fixes the engine cylinder body. At least two groups of positioning pin shafts corresponding to the positioning pin holes in the engine cylinder body are arranged, so that when the engine cylinder body is clamped and put on line, the positioning pin shafts can play a role in positioning the cl