The invention discloses a double surface tapping clamp. A foundation is provided with a vertical shaft and a support; the left side of the vertical shaft is provided with a left spinning pressing seat; the right side of the vertical shaft is provided with a right spinning pressing seat; a screw passes through the right spinning pressing seat, the vertical shaft and the left spinning pressing seat and is arranged in the support; the screw is provided with a handle; and the left spinning pressing seat, and the right spinning pressing seat are arranged in a position groove of the foundation through orientation bolts at the lower ends of the left spinning pressing seat, and the right spinning pressing seat respectively. The defects of single function and low efficiency of the conventional clamp are overcome. Compared with the prior art, the invention has the advantages that the double surface tapping clamp has a simple structure, transmits stably, can disassemble a workpiece at high speed, can process two workpieces which have different heights and consistent processing length simultaneously, and clamp the workpiece firmly and does not damage the workpiece, is high in practicability and efficiency and low in cost, convenient to operate and easy to manufacture, and can be widely applied to the machining field.