The utility model discloses a low-voltage load unbalance adjusting and intelligent reactive dynamic compensation device, which comprises a current sampling device, an isolating switch, a zero line switch, a controller, a photoelectric coupler, an inverter, a battery pack, a self-coupling transformer and a circuit breaker, wherein the current sampling device comprises four current sensors which are arranged at a phase A, a phase B, a phase C and a neutral line N respectively, the isolating switch is connected to a three-phase line of a power grid, the zero line switch is connected to the neutral line N of the power grid, the current sensors are all connected to the controller, the controller, the photoelectric coupler, the inverter, the circuit breaker and the isolating switch are sequentially connected, an input end of the self-coupling transformer is connected with the inverter, and an output end of the self-coupling transformer is connected with the zero line switch. The low-voltage load unbalance adjusting and intelligent reactive dynamic compensation device is fast in response speed and high in precision, adjusts an unbalance state of three-phase loads of a low-voltage power supply system, can realize a function of stable and fast reactive dynamic compensation, and eliminates the neutral line current.