Three—column vertical compression locked mold, vertical injection, double position rotary plate, one upper mold, two or three lower molds. The lower molds rotate alternatively with an angle of 180°or 360°on the same horizontal. When one of the lower molds is molding, others at outside for fetching objects. It possesses high safety and it can increase more than 50% of the working efficiency. Use the system closed-lap to control; First-rate rotary mechanical structure. It has better counterbalance and accuracy on the location. Integrate the water channel with oil channel. It has mechanical equipment to protect the operator’s safety. It is suitable for the high precision products to injection molding.