The invention discloses a distribution network index analysis method and a distribution network index analysis system based on big data. The method comprises the following steps of: collecting and sending the operation data of a public transformer to an electric power information acquisition system, and then storing the operation data of the public transformer in a distributed memory; calculatingthe access information of the metamorphic unit and the number of the metamorphic units based on the parallel computing framework of the distributed memory and the metamorphic operation data. The modelof each analysis index is established, and the values of each analysis index are calculated by using the parallel computing framework of distributed memory and the access information of public transformer and the number of public transformers in each unit. According to the calculated value of each analysis index, the distribution network index analysis is completed. The invention utilizes HBase to store the operation data of the public transformer, and relies on the efficient analysis of the actual effect of the distributed memory parallel calculation framework to the data, through the macroscopic control of the public transformer collection rate, the access time rate and the integrity rate, the defects of the electric network operation collection data can be found in time.