A power configuration method and a device, the power configuration method including sending, by a first network device, M power configuration parameters to a second network device, where the M power configuration parameters are corresponding to M antenna port sets, wherein at least one of the M antenna port sets belongs to the first network device, where each power configuration parameter is used to calculate power of a downlink data channel between a corresponding antenna port set and the second network device, and where M is an integer greater than or equal to 2.