Safe hoisting device

The utility model relates to a safety lifting device. The two ends of a U-shaped shackle is arranged with two pin holes with one pin hole processing screw threads; the top end of a transverse pin is processed with screw threads corresponding to the pin holes; a connecting joint consists of three concentric cylinders of connecting body with different diameters and becoming bigger from top to bottom; the upper end of the cylinder is provided with transverse pin holes; the lower end of a pipe nipple with screw threads of a drill tool is tubular, while the screw threads are arranged on the outer wall or inner wall and the upper end is provided with a connecting hole that glidingly matches with the middle cylinder of the connecting joint; the pipe nipple with screw threads of a drill tool is provided with counter bores; the bottom end cylinder of the connecting joint glidingly matches with the inside diameter of the pipe nipple with screw threads of a drill tool and is connected with the pipe nipple with screw thr