Shaped plane hole protection device

The utility model belongs to the field of buildings, and particularly relates to a shaped plane hole protection device which comprises four protection ends, a connecting rod piece and a protection plate, each protection end comprises a right-angle square pipe body, the inner side of the outer wall of each right-angle square pipe body is provided with a clamping groove, the outer side of the outer wall of each right-angle square pipe body is provided with a clamping edge, and each connecting rod piece comprises a connecting piece. The right-angle square pipe bodies are sequentially connected through the connecting pieces to form a square frame, and the protection plates are installed on the clamping grooves. The protective device is made of square steel and angle iron, the four protective ends are arranged at the four corners of the hole and connected through shaped rod pieces, the protective ends can be spliced according to the specific size of the hole, and the protective device is telescopic; the clamping e