A low-voltage power distribution device and a method for controlling low-voltage power distribution device tripping. The low-voltage power distribution device (200) comprises: a detection unit (100), which is configured to issue a closed state signal to a control unit when the low-voltage power distribution device is in a closed state; and the control unit (202), which is coupled to the detection unit and which is configured to switch the low-voltage power distribution unit from the closed state to an open state when the closed state signal is received and a tripping condition is satisfied. The method for use in controlling low-voltage power distribution device tripping comprises detecting whether the low-voltage power distribution device is in a closed state; detecting whether a tripping condition for low-voltage power distribution device tripping exists; causing the low-voltage power distribution device to execute a tripping action in response to the low-voltage power distribution device being in the closed state and the tripping condition being satisfied. The state of the low-voltage power distribution device may be clearly determined by means of detecting a closed state so as to prevent damage to the device and a circuit.