A multimode base station control method, comprising: switching on, by a base station, a passive antenna to provide service coverage in a first standard for a user; detecting, by the base station, an average traffic volume of a cell in a current state; when the average traffic volume of the cell in the current state exceeds a preset first threshold, enabling a capacity coverage that is in a second standard and is to be provided for the user, and switching an active antenna of the base station to a beam projection state, wherein when the active antenna is in the beam projection state, the method further comprises: detecting whether the average traffic volume of the cell in the current state is less than the first threshold, and when the average traffic volume of the cell is less than the first threshold, disabling the capacity coverage that is in the second standard and provided for the user, and switching the active antenna of the base station to an off state; when the average traffic volume of the cell is greater than the first threshold, determining whether the average traffic volume of the cell is greater than a second threshold, and when the average traffic volume of the cell is less than the second threshold, maintaining enabling of the capacity coverage that is in the second standard and provided for the user, and maintaining the active antenna of the base station in the beam projection state; and when the average traffic volume of the cell is greater than the second threshold, maintaining enabling of the capacity coverage that is in the second standard and provided for the user, and switching the active antenna of the base station to a split state of the active antenna, wherein the split state of the active antenna corresponds to a state in which a cell corresponding to the capacity coverage is split by controlling beamforming of the active antenna, and wherein an average traffic volume corresponding to the second threshold exceeds an average traffic volume corresponding to the first threshold. switching on, by a base station, a passive antenna to provide service coverage in a first standard for a user; detecting, by the base station, an average traffic volume of a cell in a current state; when the average traffic volume of the cell in the current state exceeds a preset first threshold, enabling a capacity coverage that is in a second standard and is to be provided for the user, and switching an active antenna of the base station to a beam projection state, wherein when the active antenna is in the beam projection state, the method further comprises: detecting whether the average traffic volume of the cell in the current state is less than the first threshold, and when the average traffic volume of the cell is less than the first threshold, disabling the capacity coverage that is in the second standard and provided for the user, and switching the active antenna of the base station to an off state; when the average traffic volume of the cell is greater than the first threshold, determining whether the average traffic volume of the cell is greater than a second threshold, and when the average traffic volume of the cell is less than the second threshold, maintaining enabling of the capacity coverage that is in the second standard and provided for the user, and maintaining the active antenna of the base station in the beam projection state; and when the average traffic volume of the cell is greater than the second threshold, maintaining enabling of the capacity coverage that is in the second standard and provided for the user, and switching the active antenna of the base station to a split state of the active antenna, wherein the split state of the active antenna corresponds to a state in which a cell corresponding to the capacity coverage is split by controlling beamforming of the active antenna, and wherein an average traffic volume corresponding to the second threshold exceeds an average traffic volume corresponding to the first threshold. detecting whether the average traffic volume of the cell in the current state is less than the first threshold, and when the average traffic volume of the cell is less than the first threshold, disabling the capacity coverage that is in the second standard and provided for the user, and switching the active antenna of the base station to an off state; when the average traffic volume of the cell is greater than the first threshold, determining whether the average traffic volume of the cell is greater than a second threshold, and when the average traffic volume of the cell is less than the second threshold, maintaining enabling of the capacity coverage that is in the second standard and provided for the user, and maintaining the active antenna of the base station in the beam projection state; and when the average traffic volume of the cell is greater than the second threshold, maintaining enabling of the capacity coverage that is in the second standard and provided for the user, and switching the active antenna of the base station to a split state of the active antenna, wherein the split state of the active antenna corresponds to a state in which a cell corresponding to the capacity coverage is split by controlling beamforming of the active antenna, and wherein an average traffic volume corresponding to the second threshold exceeds an average traffic volume corresponding to the first threshold.