The invention discloses a method for processing power grid planning mass data. The method comprises the steps of reading electric meter data of a plurality of intelligent electric meters; encapsulating the data of the plurality of electric meters into general packet radio service (GPRS) data, and adding corresponding identification information to the data of each electric meter; transmitting the GPRS data to a processor; analyzing the GPRS data through the processor to obtain the electric meter data and the corresponding identification information of the plurality of intelligent electric meters; according to the corresponding identification information, transmitting the electric meter data and the identification information to corresponding client sides; editing the electric meter data through interface operation of each client side into form documents in the EXCEL format or in other formats; and establishing a data interface between each client side and a database, importing the form documents into the database through the data interfaces, and locking the database for backing up, or exporting the form documents from the database into the corresponding client sides for inquiring. By the aid of the method, a large amount of manpower is reduced, and the accuracy and the efficiency of processing of the power grid planning data are improved.