The utility model discloses a secure and reliable drop-preventing bracket with convenient installation; the drop-preventing bracket comprises a supporting bar; a safety belt binding ring is fixedly connected at the top end of the supporting bar; a back plate is connected at the lower part of the supporting bar; the back plate is installed vertically; the upper part of one side surface of the back plate is connected on the outer surface at the lower part of the supporting bar; two or more hook-headed bolts are connected on the left part of the back plate; a hook head is connected at the front end of each hook-headed bolt, and the rear end passes through the back plate; and a handwheel is arranged at the back end of each hook-headed bolt through the screw thread.