The invention provides a direct-current deicing and SVG (Static Var Generator) device based on full-controlled rectification units. The direct-current deicing and SVG device comprises a network-side high voltage circuit breaker, a multiple-winding phase-shifting step-down transformer and a current transformer; the primary side of the multiple-winding phase-shifting step-down transformer is connected to a power grid by virtue of the network-side high voltage circuit breaker, the secondary windings of the multiple-winding phase-shifting step-down transformer are connected to the current transformer, and the output end of the current transformer is connected to the overhead line of the power grid; the current transformer is composed of at least one full-controlled rectification unit; the input ends of the full-controlled rectification units are connected to the independent windings of the corresponding secondary sides of the multiple-winding phase-shifting step-down transformer by use of low voltage circuit breaker, respectively, and the negative and positive poles of the output ends of the full-controlled rectification units are orderly connected in series to form a direct-current output circuit as the direct-current output of the device. The direct-current deicing and SVG device based on the full-controlled rectification units are more convenient to operate, higher in practicability, higher in efficiency, more convenient to maintain and lower in price.