The invention discloses a pig ripping machine which comprises a base. A vertically-arranged stand column is installed at the right end of the base. A horizontally-arranged top beam is fixedly installed on the left side of the upper end of the stand column. A motor is installed on the top beam. The output end of the motor is in transmission connection with a wire coil. A steel wire rope is wound to the wire coil. A hook is fixedly connected to the bottom end of the steel wire rope. A pig is hooked through the hook, the motor rotates to drive the steel wire rope to withdraw, and therefore the pig is hooked. A sliding installation column is arranged on the left side of the motor and provided with a vertically-arranged slot. The top beam penetrates through the slot. The pig ripping machine is simple and reasonable in structure, convenient to use and operate, capable of achieving rapid conveying of the pig on the whole and achieving hoisting conveniently and rapidly, high in ripping speed, low in overall cost and quite suitable for small processing plants.