Automatic low-voltage circuit breaker closing device and automatic closing method by using device after no-voltage release

The invention provides an automatic low-voltage circuit breaker closing device, and belongs to the field of reclosing devices. The device comprises a low-voltage circuit breaker which is provided with a time relay, wherein a sliding contact, a termination contact and a clock mechanism are arranged in the time relay; the sliding contact and the termination contact are located at two ends of a right-angle connecting rod and provided with corresponding static contacts respectively, and the sliding contact and the termination contact are driven by the clock mechanism; a No.1 port and a No.13 port of the time relay are connected among different leading-out terminals of a low voltage side of a transformer, a fuse protector and the low-voltage circuit breaker respectively; and a No.17 port and a No.3 port of the time relay are short-circuited, and a No.16 port and a No.4 port are connected with two ends of an electric closing button of the low-voltage circuit breaker in parallel. According to the device, manpower is