An antenna splitting method in an active antenna system, comprising: when load of an active antenna system, AAS, cell is greater than or equal to a load threshold, if a cell in an optimized area is not overloaded, load of a first cell is less than the load of the AAS cell, and load of a second cell is less than the load of the AAS cell, acquiring a first antenna parameter combination corresponding to a maximum capacity of the optimized area, wherein the first cell and the second cell are two cells obtained after the AAS cell is pre-split, the optimized area is the AAS cell, or is the AAS cell and at least one neighboring cell of the AAS cell, and the first antenna parameter combination comprises a first antenna parameter of the first cell and a second antenna parameter of the second cell, wherein: the first antenna parameter comprises a downtilt of a first antenna and a transmit power of the first antenna, and the second antenna parameter comprises a downtilt of a second antenna and a transmit power of the second antenna; and splitting an AAS antenna according to the first antenna parameter combination, wherein the acquiring a first antenna parameter combination corresponding to a maximum capacity of the optimized area comprises: acquiring measurement information that is collected by user equipment in the optimized area within a preset duration; performing estimation on the basis of the measurement information by using multiple antenna parameter combinations, to obtain an estimated value that is of the measurement information and corresponding to each antenna parameter combination of the multiple antenna parameter combinations; calculating, according to the estimated value of the measurement information, a capacity that is of the optimized area and corresponding to each antenna parameter combination; and acquiring, according to the capacity that is of the optimized area and corresponding to each antenna parameter combination, the first antenna parameter combination corresponding to the maximum capacity of the optimized area. when load of an active antenna system, AAS, cell is greater than or equal to a load threshold, if a cell in an optimized area is not overloaded, load of a first cell is less than the load of the AAS cell, and load of a second cell is less than the load of the AAS cell, acquiring a first antenna parameter combination corresponding to a maximum capacity of the optimized area, wherein the first cell and the second cell are two cells obtained after the AAS cell is pre-split, the optimized area is the AAS cell, or is the AAS cell and at least one neighboring cell of the AAS cell, and the first antenna parameter combination comprises a first antenna parameter of the first cell and a second antenna parameter of the second cell, wherein: the first antenna parameter comprises a downtilt of a first antenna and a transmit power of the first antenna, and the second antenna parameter comprises a downtilt of a second antenna and a transmit power of the second antenna; and splitting an AAS antenna according to the first antenna parameter combination, wherein the acquiring a first antenna parameter combination corresponding to a maximum capacity of the optimized area comprises: acquiring measurement information that is collected by user equipment in the optimized area within a preset duration; performing estimation on the basis of the measurement information by using multiple antenna parameter combinations, to obtain an estimated value that is of the measurement information and corresponding to each antenna parameter combination of the multiple antenna parameter combinations; calculating, according to the estimated value of the measurement information, a capacity that is of the optimized area and corresponding to each antenna parameter combination; and acquiring, according to the capacity that is of the optimized area and corresponding to each antenna parameter combination, the first antenna parameter combination corresponding to the maximum capacity of the optimized area. acquiring measurement information that is collected by user equipment in the optimized area within a preset duration; performing estimation on the basis of the measurement information by using multiple antenna parameter combinations, to obtain an estimated value that is of the measurement information and corresponding to each antenna parameter combination of the multiple antenna parameter combinations; calculating, according to the estimated value of the measurement information, a capacity that is of the optimized area and corresponding to each antenna parameter combination; and acquiring, according to the capacity that is of the optimized area and corresponding to each antenna parameter combination, the first antenna parameter combination corresponding to the maximum capacity of the optimized area.