High-altitude anti-falling net with tightening effect for building construction

The utility model discloses a building construction high-altitude anti-falling net with a tightening effect, which comprises a concentric-square-shaped frame, a pull rod and a protective net, the inner wall of the concentric-square-shaped frame is connected with the pull rod, the inner wall of the pull rod is connected with the protective net, the protective net is used as a buffer foundation, a first cavity is arranged on one side wall of the concentric-square-shaped frame, and a second cavity is arranged on the other side wall of the concentric-square-shaped frame. The connecting rod is connected into the concentric-square-shaped frame in a penetrating mode. According to the high-altitude anti-falling net with the tightening effect for building construction, a handle is rotated to drive a first bevel gear, the first bevel gear drives a first threaded rod, the first threaded rod pushes a pull rod to move, the effect of tightening the high-altitude protective net to increase tension is achieved, a baffle is p