Projection demonstration device for engineering drawing model

The utility model discloses an engineering drawing model projection demonstration device which comprises a base, a first telescopic rod is fixedly installed on the base, a fixing plate is fixedly installed at the telescopic end of the first telescopic rod, four telescopic rods are arranged on the upper surface of the fixing plate and located at the four corners of the fixing plate respectively, and the four telescopic rods are fixedly installed on the base. And two connecting rods are fixedly mounted at the centers of the two sides of the upper surface of the fixing plate, a mounting plate is arranged above the fixing plate, and a second mounting seat is arranged at the center of the lower surface of the mounting plate. According to the utility model, the projector has strong adjustability in projection height and projection angle, the projection angle of the projector can be covered within a certain angle by rotating the damping rotating shaft, the mounting plate is supported by the four telescopic rods to k