A multifunctional clamp relates to a clamp, including a mounting seat, a clamping block, a screw rod, a screw rod nut, a push rod, and a guide rod. The mounting seat is provided with a center block at the inner center, and the mounting seat is provided with a guide groove for the rod at both ends, and the guide groove for the rod is slidably matched with the two ends of the push rod. The mounting seat is also connected to the two ends of the screw rod, and the two ends of the screw rod have different screw directions; the mounting seat is provided with a centrally symmetrical clamping block guide groove; the middle part of the push rod is fixedly connected with the screw nut; the push rod is respectively sleeved with a clamping block support on both sides of the screw nut, the middle part of the clamping block support is slidably matched with the clamping block guide groove, the upper part of the clamping block support is fixedly connected with the clamping block, and the clamping block support is also sleeved on the guide rod, one end of the guide rod is connected to the four corners of the mounting seat, and the other end is connected to the center block. The invention has the characteristics of reliable and reasonable structure, diversification of functions, high positioning and clamping precision, and high clamping efficiency, and is easy to promote and use.