Safety warning device for building construction safety protection

The utility model discloses a safety warning device for building construction safety protection, which comprises a support, a warning plate for warning is arranged on the front side of the support, guide grooves are respectively arranged on the inner wall surfaces of two ends of the support, and a guide rod is fixedly connected on the rear end side wall of the warning plate between the support. The two ends of the guide rod extend into the guide grooves in the two sides correspondingly, a limiting rod is fixedly connected to the upper side of the side wall of the rear end of the warning plate, a fixing mechanism used for fixing the position of the guide rod and the guide grooves is arranged between the guide rod and the guide grooves, and supporting legs used for supporting the support are arranged on the rear side of the support. Compared with an existing warning device, the device can be rapidly unfolded to display warning content when used, the device can be rapidly folded and stored after being used, the