Assembled building component hoisting device and hoisting method thereof

The invention relates to the technical field of constructional engineering instruments, and discloses an assembly type building component hoisting device and a hoisting method.The surface of the lower portion of a hoisting tool is provided with external threads, side blocks are embedded in the two sides of the upper portion of the hoisting tool, and the bottom end of a hoisting plate located on one side of a hoisting rope is fixedly connected with a limiting piece; the outer wall of the movable ring is fixedly connected with the rack, and the inner wall of the movable ring is provided with an internal thread matched with the external thread. The limiting piece is arranged at the bottom end of the lifting plate, when a prefabricated part needs to be unhooked, the lifting appliance is promoted to move to the position below the limiting piece through winding operation of the lifting rope, the lifting appliance is connected with the movable ring in a threaded and sleeved mode, meanwhile, the movable ring is drive