The precision plastic mold mainly comprises a concave mold combination base plate, a concave mold component and a concave mold combination.

A female die with a variable cavity composed of a clamping plate, a male die with a variable core composed of a convex die combination substrate, a convex die component, a convex die combination clamping plate, a cavity cutting component and a side section combination plate. Coordinated changes of the punch, die and auxiliary molding system. It can process series plastic parts of different shapes and sizes.