A power sharing method, comprising: estimating a first transmit power based on a traffic volume of terminal devices to be scheduled in a first carrier in a first scheduling period, wherein the first transmit power is a transmit power required in the first carrier to schedule the to-be-scheduled terminal devices in the first scheduling period; and estimating a second transmit power based on the first transmit power and an initially configured transmit power, wherein the second transmit power is a remaining transmit power of the first carrier in the first scheduling period, wherein the method further comprises: calculating a third transmit power based on the second transmit power and a preset shared transmit power, wherein the third transmit power is a sharable transmit power of the first carrier in the first scheduling period; broadcasting information about the third transmit power to a transmit power sharing group, wherein the transmit power sharing group comprises a plurality of carriers, and the first carrier is any carrier in the transmit power sharing group; receiving information about a fourth transmit power, wherein the fourth transmit power is a sharable transmit power of another carrier, other than the first carrier, in the transmit power sharing group; and calculating a fifth transmit power based on the information about the third transmit power and the information about the fourth transmit power, wherein the fifth transmit power is an actually shared transmit power of the first carrier in the first scheduling period. estimating a first transmit power based on a traffic volume of terminal devices to be scheduled in a first carrier in a first scheduling period, wherein the first transmit power is a transmit power required in the first carrier to schedule the to-be-scheduled terminal devices in the first scheduling period; and estimating a second transmit power based on the first transmit power and an initially configured transmit power, wherein the second transmit power is a remaining transmit power of the first carrier in the first scheduling period, wherein the method further comprises: calculating a third transmit power based on the second transmit power and a preset shared transmit power, wherein the third transmit power is a sharable transmit power of the first carrier in the first scheduling period; broadcasting information about the third transmit power to a transmit power sharing group, wherein the transmit power sharing group comprises a plurality of carriers, and the first carrier is any carrier in the transmit power sharing group; receiving information about a fourth transmit power, wherein the fourth transmit power is a sharable transmit power of another carrier, other than the first carrier, in the transmit power sharing group; and calculating a fifth transmit power based on the information about the third transmit power and the information about the fourth transmit power, wherein the fifth transmit power is an actually shared transmit power of the first carrier in the first scheduling period. calculating a third transmit power based on the second transmit power and a preset shared transmit power, wherein the third transmit power is a sharable transmit power of the first carrier in the first scheduling period; broadcasting information about the third transmit power to a transmit power sharing group, wherein the transmit power sharing group comprises a plurality of carriers, and the first carrier is any carrier in the transmit power sharing group; receiving information about a fourth transmit power, wherein the fourth transmit power is a sharable transmit power of another carrier, other than the first carrier, in the transmit power sharing group; and calculating a fifth transmit power based on the information about the third transmit power and the information about the fourth transmit power, wherein the fifth transmit power is an actually shared transmit power of the first carrier in the first scheduling period.