The invention relates to a method for intelligently identifying the bus and feeder and transformer topology connection relationship based on big data, relates to the technical field of power primary line connection relationship determination, particularly relates to a method for identifying a bus-feeder-distribution transformer connection relationship and utilizes operating characteristics of a transformer under a feeder. The method is characterized in that the goodness of model fitting is calculated, a goodness-of-fitting threshold and a transformer standard reaching ratio threshold are made,the proportion of transformers reaching the goodness-of-fitting threshold is calculated, if the proportion reaches the relevant threshold, the bus is determined to be the bus corresponding to the feeder; according to the fitting goodness sorting situation of the distribution transformers under the feeder, the relative position among the distribution transformers under the feeder is determined. The method is advantaged in that the calculation result is comprehensively considered, and the bus-feeder-distribution transformer network topology structure is drafted.