Internal high-pressure forming machine

The invention discloses an internal high-pressure forming machine which comprises a rack, a forming liquid storing device, a supercharging injection device and a die. At least two side pushing devices located on the peripheral side are arranged in the rack; each side pushing device comprises a fixing base and a side cylinder; the fixing base is internally provided with an avoiding position, and a lifting mechanism is arranged in the avoiding position; the side cylinder penetrates the avoiding position, the side cylinder is provided with a piston rod capable of getting close to the die in a reciprocated manner, a pushing head block matched with an opening in the end side of the die is arranged on the piston rod and is communicated with the supercharging injection device; and a movement part capable of being lifted relative to the rack is arranged on the lifting mechanism and is connected with the side cylinder, and the lifting route of the movement part is parallel to the lifting route of a movable transverse