A residual voltage recording module and a residual voltage detection method of recloser type feed line terminal relate to the field of power detection equipment, and especially to a recloser that feedline terminal for detecting the residual voltage and locking in power failure and a related method. The residual voltage recording module structurally comprises a rectification module, a current-limiting resistor, an energy storage capacitor, a freewheeling diode, a clamping diode, a bistable relay, and a voltage monopulse maintenance module. When there is residual voltage in a power distributionline, a residual voltage event recording module records a residual voltage event and maintains the residual voltage. After that the feed line terminal runs normally, state information in the residualvoltage event recording module is detected to determine a residual voltage fault, a corresponding motion is executed, and a fault area is isolated. The residual voltage event recording module employsall reactive devices, the motion time is short, the residual voltage event can be recorded, the feed line terminal can accurately determine a fault position according to information of the residual voltage event recording module, the fault line is isolated, and power supply of the normal line is ensured.