Foldable protective guard for building construction

The utility model discloses a foldable protective guard for building construction. The device comprises a first protection plate and a second protection plate, a second protection plate is fixedly mounted on one side of the first protection plate through a hinge structure; protective windows are fixedly mounted on the first protective plate and the second protective plate; first vertical rods arefixedly mounted on the outer sides of the first protection plate and the second protection plate correspondingly, baffles are movably mounted at the tops of the first protection plate and the second protection plate correspondingly, a warning propaganda plate is fixedly mounted on the front faces of the baffles, and warning plates are fixedly mounted at the bottoms of the first protection plate and the second protection plate. According to the protective guard, the protective guard achieves the folding function through the hinge structure, workers can fold and recycle the protective guard conveniently, the arranged ba