An injection mold that can quickly replace a live insert core block: The utility model discloses an injection mold that can quickly replace a live insert core block, comprising a lower clamping plate and an upper clamping plate, the upper surface of the lower clamping plate is fixedly connected with a strip The upper surface of the stripping plate is provided with a plurality of first installation holes, the first installation holes are movably connected with a guide column, the top of the guide column is fixedly connected with a lower cavity mold, and the upper surface of the lower cavity mold is provided with a cavity. The bottom of the cavity is provided with a guide groove, and the cavity is provided with a core block. The utility model can not only change the shape of the injection mold by replacing the core blocks of different styles, save a lot of time, and improve the efficiency of injection molding of the mold, but also can automatically lift the core through the drive of the motor when the injection molding of the mold is completed. It is convenient for the disassembly of the injection mold core block, and it can also provide a buffer for the mold injection, reduce the pressure in the process of mold injection, and improve the injection effect of the mold.