The utility model relates to a quenching safety unhooking device. The quenching safety unhooking device comprises a main body, a hanging structure arranged on the upper end of the main body and used for connecting a hook of a quenching crane, and a clamping mechanism arranged on the lower end of main body and used for clamping a quenching workpiece and disconnecting the quenching workpiece from the main body, wherein the clamping mechanism is mainly composed of a connection rod and clamping arms, which are common in the prior art; and the clamping mechanism is connected with the main body only in hinging and sliding assembly manners. Therefore, the quenching safety unhooking device provided by the utility model has the characteristics of simple structure and low cost so as to solve the problems of complex overall structure and high manufacture cost of a quenching safety device in the prior art.