Hydraulic quick die changing device

The utility model relates to the technical field of die disassembly and assembly, in particular to a hydraulic quick die changing device which is characterized in that the hydraulic quick die changing device is connected through a sliding groove structure, then a motor is used for driving a rotary disc to stretch out and draw back quickly, and replacement is convenient. The power motor in the control device is started to further drive the power shaft and the conversion disc to rotate, and then the arc-shaped groove in the upper end face of the conversion disc is in sliding connection with the positioning pin, so that the positioning pin stably slides along the limiting channel. The connecting piece is inserted into the bottom of the connecting groove along the clamping groove of the connecting groove, then the power motor is controlled to be started to further control the positioning pin to slide along the limiting channel, and the positioning pin is synchronously controlled to enter or retreat from the embed