The invention relates to a distribution automation terminal arrangement method based on power supply reliability for arranging distribution automation terminals in an overhead network and/or a cable network. The method comprises the following steps: 1) a grid structure power supply reliability model is constructed; 2) node position information of the overhead network and/or the cable network is acquired respectively, and a power supply reliability target is set; and 3) an initial distribution automation terminal arrangement scheme is set, distribution automation terminal node positions and terminal types are arranged, the power supply reliability is calculated according to the grid structure power supply reliability model, whether the scheme is feasible is judged according to the power supply reliability target, and the best distribution automation terminal arrangement scheme is finally acquired. Compared with the prior art, the method of the invention has the advantages of considering the distribution terminals, optimizing schemes, and having referential significance.