A cell power management method, wherein the method is applied to a network node managing a power of a same sector, the same sector comprises multiple cells, the same sector belongs to the network node, and the method comprises: configuring, by the network node, a maximum transmit power of the same sector, and controlling a transmit power of each cell to be not greater than a first threshold, wherein the network node does not perform power control on a GSM primary band carrier power, an LTE pilot channel power, a UMTS pilot channel power, and a common channel power; allocating, by the network node when the same sector is in an initial state, a first power to each cell according to a first allocation policy, wherein the first allocation policy comprises allocating power to each cell in descending order of priorities of the cells at an equal ratio or allocating a basic power to each cell, where the basic power corresponds to a service type and a network type; and allocating, by the network node when the same sector is in a connected mode, a second power to each cell according to a current power and a required power utilization rate that are of each cell, so that a mean power of each cell is not greater than a second threshold, characterized in when the network node determines that a sum of power utilization rates of all the cells in the same sector is not less than the maximum transmit power, the allocating, by the network node, a second power to each cell according to a current power and a required power utilization rate that are of each cell specifically comprises one of the following cases: reducing an original power utilization rate of each cell in descending order of priorities of the cells at an equal ratio; or determining a first cell whose power utilization rate is greater than or equal to the second threshold and a second cell whose power utilization rate is less than a third threshold; and reducing a third power of the first cell and a fourth power of the second cell according to a first policy, wherein the reducing a third power of the first cell and a fourth power of the second cell according to a first policy specifically comprises: calculating a first total power value that needs to be reduced, and calculating a sum of the third power and the fourth power to obtain a second total power value; reducing the third power according to the first total power value and according to a ratio of the third power to the second total power value; and reducing the fourth power according to a ratio of the fourth power to the second total power value. configuring, by the network node, a maximum transmit power of the same sector, and controlling a transmit power of each cell to be not greater than a first threshold, wherein the network node does not perform power control on a GSM primary band carrier power, an LTE pilot channel power, a UMTS pilot channel power, and a common channel power; allocating, by the network node when the same sector is in an initial state, a first power to each cell according to a first allocation policy, wherein the first allocation policy comprises allocating power to each cell in descending order of priorities of the cells at an equal ratio or allocating a basic power to each cell, where the basic power corresponds to a service type and a network type; and allocating, by the network node when the same sector is in a connected mode, a second power to each cell according to a current power and a required power utilization rate that are of each cell, so that a mean power of each cell is not greater than a second threshold, when the network node determines that a sum of power utilization rates of all the cells in the same sector is not less than the maximum transmit power, the allocating, by the network node, a second power to each cell according to a current power and a required power utilization rate that are of each cell specifically comprises one of the following cases: reducing an original power utilization rate of each cell in descending order of priorities of the cells at an equal ratio; or determining a first cell whose power utilization rate is greater than or equal to the second threshold and a second cell whose power utilization rate is less than a third threshold; and reducing a third power of the first cell and a fourth power of the second cell according to a first policy, wherein the reducing a third power of the first cell and a fourth power of the second cell according to a first policy specifically comprises: reducing an original power utilization rate of each cell in descending order of priorities of the cells at an equal ratio; or determining a first cell whose power utilization rate is greater than or equal to the second threshold and a second cell whose power utilization rate is less than a third threshold; and reducing a third power of the first cell and a fourth power of the second cell according to a first policy, wherein the reducing a third power of the first cell and a fourth power of the second cell according to a first policy specifically comprises: calculating a first total power value that needs to be reduced, and calculating a sum of the third power and the fourth power to obtain a second total power value; reducing the third power according to the first total power value and according to a ratio of the third power to the second total power value; and reducing the fourth power according to a ratio of the fourth power to the second total power value.