The utility model relates to a frock clamp technical field specifically is a heat dissipation cap calmp utensil, and it can conveniently realize the reliable fixed of heat dissipation lid, and it includes the base, the base both sides are provided with vertical supporting plates, one side respectively vertical supporting plates installs three briquetting, opposite side in the upper end vertical supporting plates installs two briquettings in the upper end, the briquetting lower extreme has all left and has compressed tightly the breach, two be provided with the jacking cylinder in the middle of the vertical supporting plates, install the roof on the piston rod of jacking cylinder, install two the clamp plate the vertical supporting plates outside is provided with two support columns.