Quick positioning die changing device

The utility model discloses a quick positioning die changing device, and relates to the technical field of dies. Comprising a die changing mechanism, the die changing mechanism comprises a lower die, the lower die is placed in the middle of the top of a bottom plate, a positioning hole is formed in the middle of the bottom of the lower die, a positioning cylinder is arranged in the positioning hole and fixed to the middle of the top of the bottom plate, and supporting plates are fixedly connected to the two sides of the top of the bottom plate correspondingly; and one side of the supporting plate is fixedly connected with an electric push rod, one side of the electric push rod is fixedly connected with a positioning plate, the positioning plate is in close contact with the lower mold, and the two ends of the fixing plate are fixedly connected with first positioning mechanisms. The motion trail of the positioning block is fixed in the vertical direction through the positioning rod, and the motion trail of the