Direct-current relay and control method

The invention discloses a direct-current relay and a control method. The direct-current relay comprises a movable contact, a static contact and a driving system for driving the movable contact and the static contact to be opened/closed. The driving system comprises a direct-current worm gear motor, an eccentric wheel and an insulating sliding block; the movable contact comprises a main movable contact and an auxiliary movable contact, the static contact comprises a main static contact and an auxiliary static contact, and the end faces of the main static contact and the auxiliary static contact are located on the same plane; two short-circuit copper bars which are spaced up and down are arranged on the insulating sliding block; one side, facing the end face of the static contact, of the insulating sliding block is fixedly connected with two ejector rods, each ejector rod is sleeved with a spring and a short-circuit copper bar, and the springs are located between the short-circuit copper bars and the sliding bl