The invention provides a fault positioning algorithm based on a BFOA and an apparatus thereof and relates to the power distribution network fault positioning technology field. In the prior art, when a power distribution network reports fault information based on power distribution equipment and carries out fault positioning, positioning precision is not enough. By using the algorithm and the apparatus of the invention, the above problem is solved. The method comprises the following steps of acquiring fault information reported by i power distribution equipment in a preset power distribution network section; according to the BFOA, carrying out tendency operation on the fault information of nth power distribution equipment, and when a tendency operation frequency j of the fault information of the nth power distribution equipment is greater than or equal to a first test parameter Nc, according to the BFOA, carrying out copy operation on the fault information of the nth power distribution equipment; and when a copy operation frequency k of the fault information of the nth power distribution equipment is greater than or equal to a second preset parameter Nre, according to the BFOA, carrying out migration operation on the fault information of the nth power distribution equipment, and outputting an optimal solution of the fault information of the nth power distribution equipment. The embodiments of the invention are used for positioning a power distribution network fault.