A service distribution obtaining method, a network side device, and a terminal are provided in this disclosure. The method includes: obtaining, by a network side device, measurement information of multiple terminals in a serving cell and an average service volume of each of the multiple terminals, and determining service distribution, where the measurement information includes first channel state values of channels between the multiple terminals and a primary cell, the primary cell refers to the serving cell or one of neighboring cells of the serving cell, the service distribution includes a first typical channel state value of each type of the first channel state values and a first service volume between a terminal set corresponding to each type of the first channel state values and the primary cell, and the first service volume is determined according to the average service volume of each terminal.