The utility model discloses an architectural equipment technical field's a clamping device for building templates, including the installation pole, the outer wall middle position of installation pole is fixed with the fixed block, the top of fixed block is fixed with the handle, open in the outer wall left side of installation pole has the left -hand thread, the telescopic link includes the telescope tube, peg graft and have the regulation pole in the inner chamber top of telescope tube, the draw runner is all installed to the inner chamber left and right sides of telescope tube, adjust the left and right sides of pole and all opened the spout with draw runner matched with, the equal movable mounting in the left and right sides of installation pole has an end cover, can realize building templates's clamp tightly through rotating the handle, moreover when using, can change the clamping length of clamping board through adjusting the telescopic link to can satisfy the use needs, the rubber pad on the splint has played the effect of antiskid with the protection, and rubber pad convenient to detach and change, and this utility model structure is simple, and the equipment is convenient, and the practicality is strong.