The invention provides a solid combination switch device which can switch a parallel capacitor to a system automatically; the device is mainly used for reactive compensation of a high-voltage electric power system, zero passage (arcless) conduction and cut-off of a high-voltage electric power capacitor set is carried out automatically by calculating the reactive power value of the system; the solid combination switch device mainly comprises that: a thyristor, a contactor, a thyristor energy delivery system and a control system are integrated into a combined mechanism in an equipment cabinet, and an external connecting wire only needs three-phase voltage, electric current signals and direct-current 220V control power supply to realize the combination switch which can automatically switch the parallel capacitor set.