The invention discloses a SVG (Static Var Generator) DC ice melting device control system. The system adopts a layered phase-split structure, and is composed of a system controller, bridge arm controllers and local controllers, wherein the system controller is mainly used for calculation of control protection algorithm, realization of logic control and communication with a back stage; the bridge arm controllers are mainly used for module voltage-sharing control and carrier phase shifting; and the local controllers are used for directly controlling power units, converting optical signals to electric signals, and acquiring DC voltage and temperature of the power units and fault information of a switch device. Optical fiber communication is adopted between the system controller and the bridge arm controllers and between the bridge arm controllers and the local controllers, the needed related control protection information is transmitted, and layered phase-split protection is adopted. Through control of the system, the DC ice melting device can be switched in the SVG mode and in the DC ice melting mode.