The invention discloses a distribution line fault self-healing controller and a distribution line fault self-healing control method and belongs to the field of power distribution automation. The controllers are arranged on section switches of distribution lines provided with a double-end power supply and conducting open-loop power supply and are used for setting no-voltage judgment, over-current judgment, small current grounding judgment and a spare power automatic switching function control program, automatically isolating a fault area and restoring power supply to non-fault areas. According to the distribution line fault self-healing control method, the pulsation blocking function is utilized, when a distribution line fails and recluses, a spare power automatic switch can be shut down by means of voltage pulsation signals; consequently, the power restoration time is shortened, the situation that equipment is impacted due to the fact that the fault line is reclosed repeatedly is prevented, and the safe and stable operation of a power distribution network is facilitated.