The invention discloses a distribution network planning scheme evaluation data processing system which comprises an economic index processing module based on whole life cycle cost, a reliability index processing module based on a minimal path method, and a flexibility index processing module based on maximum power supply capability. The economic index processing module based on the whole life cycle cost is used for taking the investment cost, operation and maintenance cost, life period and the like as input data, calculating and processing the data and outputting the whole life cycle cost and traditional financial evaluation indexes; the reliability index processing module is used for taking the planning scheme structure, equipment parameters and the like as input data, outputting the system average interruption frequency and other indexes of load nodes and the equivalent mean interruption duration on the system side and the other indexes; and the flexibility index processing module based on the maximum power supply capability is used for outputting the maximum power supply capability, the network transfer capability and the other indexes. Finally, comprehensive evaluation of multiple indexes is realized by adopting a fuzzy mathematics comprehensive evaluation module. Compared with the prior art, the distribution network planning scheme evaluation data processing system disclosed by the invention has the advantages of comprehensiveness and practicality.