Energy efficiency improving device for power supply

The utility model discloses an energy efficiency improving device for electric power supply. Box body, two threading holes are formed in one side of the box body; the inner side of each threading holeis sleeved with a protective sleeve; a first wire is inserted into one side of the protective sleeve; a sodium-sulfur storage battery is fixed on the inner wall of the bottom of the box body throughbolts; one side of the input end of the sodium-sulfur storage battery is connected with one end of a first wire; a second wire is fixed on one side of the output end of the sodium-sulfur storage battery through a bolt; a transformer is fixed to the inner wall of the bottom of the box body through bolts, two junction boxes are fixed to the top end of the transformer through bolts, a second wire isfixed to one side of one junction box through bolts, a third wire is fixed to one side of the other junction box through bolts, and the other end of the third wire is connected with a protective sleeve in an inserted mode. Acco