The invention discloses an electric life buoy. The electric life buoy comprise a housing which is U-shaped; the two ends of the housing are separately equipped with a first accommodating cavity, a second accommodating cavity as well as a first water-draining hole and a second water-draining hole; the first accommodating cavity is covered by a first cover plate; the second accommodating cavity is covered by a second cover plate; a water inlet slot is formed in each of the first cover plate and the second cover plate; a first propeller is arranged in the first accommodating cavity; a second propeller is arranged in the second accommodating cavity; a first mounting cavity and a second mounting cavity are further arranged in the housing; a first motor is arranged in the first mounting cavity; a second motor is arranged in the second mounting cavity; the output shaft of the first motor is connected with the first propeller; the output shaft of the second motor is connected with the second propeller; a power device and a control device are further arranged in the housing; and a signal receiver is arranged in the control device. The electric life buoy can automatically move about, so that physical output of a user is reduced, life safety of the user is guaranteed, and a fall-in-water person can be timely rescued.