The invention provides a lightening locating data imaging method which comprises the following steps of: 1, performing gridding density processing on discrete lightening stroke point data; 2, performing isodense linear processing on regularly-discrete gridding density data; 3, automatically smoothing isodenses into closed curves and filling to generate a lightening density distribution map; and 4, overlaying the lightening density distribution map with a geographic information system (GIS) of a power grid and displaying. By the method, various lightening positions and area density patterns can be generated, the influence of lightening on electrical equipment can be intuitively reflected, and the capability of preventing and treating disasters of a power enterprise is improved.