Safety belt for building construction

The utility model relates to a safety belt for building construction. The safety belt comprises a safety rope, a hook, an elastic piece and a driving mechanism. The hook is connected to one end of the safety rope and comprises two hook parts which are oppositely arranged and hinged together, and the two hook parts jointly define a hanging cavity used for hanging a safety belt. The two ends of the elastic piece are connected to the ends, facing the safety rope, of the two hook parts correspondingly, and the ends, away from the safety rope, of the two hook parts form hanging openings. The driving mechanism is connected to the side, facing an operator, of the safety rope and connected with the elastic piece. The driving mechanism can move in the direction close to the safety rope so as to drive the elastic piece to contract and drive the two hook parts to move in the directions away from each other, so that the hanging opening is opened for unhooking, and compared with the scheme that an operator frequently retu