Motor cylinder machining clamp

The utility model belongs to the field of clamps, and provides a motor cylinder machining clamp which comprises a bottom plate. The insertion shaft is arranged on the bottom plate, and the insertion shaft is used for being inserted into a motor cylinder; the positioning assembly is movably arranged on the inserting shaft, three or more positioning blocks are movably arranged at the upper end of the positioning assembly, and the positioning blocks are evenly and annularly distributed and located above the inserting shaft; the clamping assembly is arranged on the bottom plate, and the clamping assembly is used for clamping the lower end of the motor barrel; when the insertion shaft is inserted into the motor cylinder, each positioning block can abut against the inner side wall of the motor cylinder. Compared with the prior art, the motor cylinder machining clamp has the advantages that the rotating axis of the motor cylinder can be the same as the axis of the positioning block, it is guaranteed that the install