Lifting device with automatic unhooking function

The utility model provides a lifting device with the automatic unhooking function. The lifting device with the automatic unhooking function comprises two main hooks. An auxiliary hook is hinged to an auxiliary hook shaft and is located between the two main hooks. The upper end of the auxiliary hook is provided with a prod. The lower end of the auxiliary hook is provided with a hook point portion extending upwards along the inner edges of the main hooks. Sliding pin buckle mechanisms corresponding to the prod are arranged on the upper portions of the main hooks. Each sliding pin buckle mechanism comprises a U-shaped shell and a control lever, a longitudinal guiding groove is formed in the inner wall of each U-shaped shell, a lever shaft is arranged outside the shell, a sliding pin buckle in contact with the prod is arranged in each guiding groove in a sliding mode, a limiting pin corresponding to the corresponding sliding pin buckle is arranged in each guiding groove, each sliding pin buckle is composed of a s