Workpiece fixing tool of spraying machine

The utility model discloses a workpiece fixing tool of a spraying machine, which relates to the field of spraying machines and comprises a base, a mounting frame is fixed on the rear portion of the upper side of the base, first grooves are formed in the left portion and the right portion of the front side of the mounting frame respectively, and second grooves are formed in the upper portion and the lower portion of the front side of the mounting frame respectively. Symmetrical first lead screws are movably installed in the left first groove and the right first groove correspondingly, symmetrical second lead screws are movably installed in the upper second groove and the lower second groove correspondingly, the first lead screws and the second lead screws are sleeved with nut seats correspondingly, and supporting plates are fixed to the front ends of the nut seats. Buffer assemblies are movably connected to the inner sides of the four supporting plates correspondingly, and flexible extrusion supporting blocks