The roof photovoltaic bracket clamp is screwed with the nut after passing through the through hole of the movable clamp arm and the through hole of the fixed part with a new type of bolt, and the movable clamp arms on both sides are tightly pressed on the two side walls of the fixed clamp. And keep parallel, so that the two movable clip arm clip hooks are firmly locked on the end of the color steel tile, ensuring that the utility model is parallel to the surface of the color steel tile, and has the advantages of firm fixation and convenient disassembly and assembly.