The invention discloses a power grid planning data processing method and relates to the technical field of power grids. The power grid planning data processing method mainly aims at acquiring data accurately in time and carrying out efficient follow-up processing on the data. According to the technical scheme, a power grid company data center automatically acquires data of other systems in a power grid planning data management system through the intranet of a power grid company after the power grid planning data management system is established, wherein data include business data and space data; the obtained business data and space data are stored in a relation database; the power grid company data center acquires the corresponding data from the relation database according to the needs, performs processing on the data and outputs and displays the processed data. The power grid planning data processing method is mainly applied to the process of power grid planning data processing.