The invention discloses a centrifugal reverse molding machine which is provided with a main circuit. The main circuit comprises a main power supply contactor C, a transformer T1, a 7T69 electron tube, a transformer T2, rectifier diodes D1, D2, D3, D4, D5 and D6, a rectifying coil, three low-heat contactors C1, three high-heat contactors C2, three rectifying circuit main contactors C3, a full-wave rectification circuit output ampere meter A1, an overcurrent protection relay I1, a capacitor filtering circuit and a high-frequency oscillating circuit. The high-frequency oscillating circuit comprises a cross-linking capacitor C1, a switch oscillating circuit, a grid ampere meter A2 and a grid bias voltage resistor R1, wherein the switch oscillating circuit comprises an electron tube H, an inductor L1, a capacitor C3 and an inductor L2. The centrifugal reverse molding machine is small in volume and low in cost.