Construction warning board

The utility model discloses a construction warning sign, relates to construction warning sign field, including two vertical pole's support, warning sign, spacing slide groove, spacing slide block, the end face of vertical pole is equipped with receiving groove, rotation groove, the rotation groove is located the inner side of receiving groove and penetrates into spacing slide groove. The vertical rod, the inclined supporting arm and the ground are matched to form a triangular structure, so that the device is conveniently and stably placed on the ground, if the device needs to be stored, a warning sign only needs to be pulled upwards to enable a limiting sliding block 3 to move to the top of a limiting sliding groove again, at the moment, the limiting sliding block does not make contact with a rotating area of the inclined supporting arm, and the device is convenient to store. When the warning sign is put down, the inclined supporting arm can be rotationally stored in the storage groove, finally, the warning s