The invention discloses a clamping device for a saw blade. A fixing clamp is simple in structure, convenient to use and capable of well fixing the saw blade. Clamping blocks are arranged on corresponding hinge rods. The hinge rods can move up and down in the vertical direction of the corresponding clamping blocks, so that the saw blade can reach the required height; meanwhile saw handles are arranged on corresponding fixing blocks and slightly higher than the fixing blocks, so that the fixing blocks can freely move between the saw handles, the fixing blocks can be replaced with new fixing blocks after being worn, and materials are saved; four chamfers are arranged on each saw handle, wear between hands and through holes is reduced, self-locking can be achieved after clamping, releasing is not likely to happen, saw teeth cannot drop out, and the clamping effect is good; besides, the clamping blocks can be reused after being worn, the materials are saved, meanwhile no positioning device is needed, and the precision is high; and in the process of clamping and taking out the saw blade, the hinge rods are rotated manually, the clamping device is easy and convenient to use and high in practicability.