A power configuration method, comprising: Sending, by a first network device, M power configuration parameters to a terminal, wherein the M power configuration parameters are corresponding to M antenna port sets, at least one of the M antenna port sets belongs to the first network device, each power configuration parameter is used to calculate power of a downlink data channel sent on a corresponding antenna port set, and M is an integer greater than or equal to 2; wherein any one of the M power configuration parameters comprises reference signal power corresponding to the power configuration parameter, and further comprises either of a first parameter and a second parameter, wherein the first parameter is used to indicate a ratio of power of an antenna port set corresponding to the power configuration parameter when a cell-specific reference signal exists on a symbol to power of the antenna port set when no cell-specific reference signal exists on the symbol, and the second parameter is a dedicated parameter used to calculate power of a downlink data channel sent by the antenna port set corresponding to the power configuration parameter; wherein each power configuration parameter further comprises identification information used to identify the power configuration parameter; and the method further comprises: sending, by the first network device, to the terminal, information used to indicate a correspondence between at least one of a quantity of data streams, an antenna port, and a codeword and identification information of a power configuration parameter; or sending, by the first network device, to the terminal, information used to indicate a correspondence between a scrambling code sequence, and identification information of a power configuration parameter and at least one of a quantity of data streams, an antenna port, and a codeword. Sending, by a first network device, M power configuration parameters to a terminal, wherein the M power configuration parameters are corresponding to M antenna port sets, at least one of the M antenna port sets belongs to the first network device, each power configuration parameter is used to calculate power of a downlink data channel sent on a corresponding antenna port set, and M is an integer greater than or equal to 2; wherein any one of the M power configuration parameters comprises reference signal power corresponding to the power configuration parameter, and further comprises either of a first parameter and a second parameter, wherein the first parameter is used to indicate a ratio of power of an antenna port set corresponding to the power configuration parameter when a cell-specific reference signal exists on a symbol to power of the antenna port set when no cell-specific reference signal exists on the symbol, and the second parameter is a dedicated parameter used to calculate power of a downlink data channel sent by the antenna port set corresponding to the power configuration parameter; wherein each power configuration parameter further comprises identification information used to identify the power configuration parameter; and the method further comprises: sending, by the first network device, to the terminal, information used to indicate a correspondence between at least one of a quantity of data streams, an antenna port, and a codeword and identification information of a power configuration parameter; or sending, by the first network device, to the terminal, information used to indicate a correspondence between a scrambling code sequence, and identification information of a power configuration parameter and at least one of a quantity of data streams, an antenna port, and a codeword. sending, by the first network device, to the terminal, information used to indicate a correspondence between at least one of a quantity of data streams, an antenna port, and a codeword and identification information of a power configuration parameter; or sending, by the first network device, to the terminal, information used to indicate a correspondence between a scrambling code sequence, and identification information of a power configuration parameter and at least one of a quantity of data streams, an antenna port, and a codeword.