Prism fixing support

The utility model belongs to the technical field of prism supports, in particular to a prism fixing support, which comprises a mounting frame, a mounting frame and a prism body, the mounting frame is mounted at the center of the surface of the mounting frame, the prism body is mounted in the mounting frame in a hinged manner, connecting pipes are hinged in notches formed in the surface of the mounting frame, and the connecting pipes are distributed in a triangular manner. The mounting and dismounting assembly is mounted in the connecting pipe; by arranging the mounting and dismounting assembly, when an inserting rod is inserted into a connecting pipe, the inserting rod pushes a clamping block to drive hinged plates to turn over, the distance between the hinged plates is increased, after the inserting rod is assisted to pass through, a spring A is stressed to rebound to push the hinged plates to drive the clamping block to turn over and reset, the clamping block is clamped into a clamping groove of the inserti