The invention discloses an auxiliary method for fault location and power supply recovery based on a GIS platform. The method comprises: distinguishing regional measurement and control properties; selecting a suitable fault location method and carrying out fault location (a rough set method, a Bayes formula method, and a power distribution network fault location method based on a GIS hierarchical power supply tree method); using an FTU device or a computing device to avoid human or power distribution network information interference, and to carry out accurate fault location; using a heuristic search algorithm to carry out analysis of different power supply recovery situations such as self-feeder recovery, whole area recovery of support feeders, partial area recovery of support feeders, load shifting, load shedding, and the like of the power distribution network, and enabling selection of a power supply recovery scheme set after a power distribution network fault; and evaluating and analyzing the selected scheme set by using a fuzzy evaluation method, to select an optimal power supply scheme. According to the method, multi-class multi-source information is comprehensively obtained; a scientific and systematic comprehensive analysis method is established to locate a faulty point; an optimal power supply recovery scheme is obtained, thereby making a conventional simple determination method obsolete.