The invention discloses a distribution network planning data management method. The method comprises the following steps that: a plurality of configuration tables which store corresponding distribution network table basic data are acquired; the configuration tables are divided into standard configuration tables and configuration tables to be matched, wherein the standard configuration tables and the configuration tables to be matched have different data sources; standard distribution network table basic data in the standard configuration tables are matched with distribution network table basic data to be matched in the configuration tables to be matched, and corresponding distribution network table basic data to be matched in the configuration tables to be matched are modified according to matching results; and data in corresponding configuration tables, which have been subjected to matching, are checked, and the distribution network table basic data in the corresponding configuration tables are corrected according to check results; and the checked configuration tables are stored. The invention also discloses a distribution network planning data management system. With the distribution network planning data management method and system of the invention adopted, the consistency of data from different sources can be ensured, wrong data can be checked and repaired, the accuracy of data management can be improved, and the efficiency and quality of the management network of the distribution network can be improved.