The present disclosure relates to a method for processing online user distribution. The method includes acquiring a map for displaying online user distribution; determining the projection algorithm of the map; determining intermediate coordinates of at least one of the points according to a longitude and a latitude and the projection algorithm, and acquiring, by using a fitting algorithm, approximate solutions of functions of mapping the intermediate coordinates to the coordinates on the map. The method further includes calculating coordinates of each online user on the map according to the projection algorithm and the approximate solutions of the mapping functions; and assembling distribution data of online users on the map according to coordinates of all the online users on the map. The present disclosure further provides an apparatus for processing online user distribution. By using embodiments of the present disclosure, online user distribution can be displayed on a map and higher precision and real-time data quality are achieved.