The invention relates to a power network resource grid meteorological influence scope analysis method based on a GIS platform. The method comprises the following steps: compiling and disposing GIS platform rear-end server codes, for receiving vast power network resource data or meteorological data in real time; scheduling a layer algorithm for the compiling and disposing, and according to logic processing of the received meteorological data, carrying out dynamic scheduling of layer data; dividing a geological region into multiple grids, and according to the grid number in the GIS platform, generating a grid matrix; obtaining meteorological information in real time; performing monitoring at a GIS platform front-end container; according to the meteorological information, displaying function display requirements of power network facility influence factors and the like; and calculating affected power network devices by use of a geological grid framework. According to the method provided by the invention, the speed is fast, the unit quality is high, the network topology can be controlled, the disadvantages of not high automation, grid density excess requirements and the like are eliminated, and the scope and condition of influences exerted by extreme weather on each factor of a power network can be accurately checked.