A power consumption control method, comprising: detecting, by a baseband unit, BBU (101; 400; 600), load of a to-be-detected cell; if the load of the to-be-detected cell is less than a first threshold, determining, by the BBU (101; 400; 600), a first allowable power of a carrier corresponding to the to-be-detected cell, wherein the first allowable power is less than a maximum allowable power of the carrier corresponding to the to-be-detected cell; and sending, by the BBU (101; 400; 600), the first allowable power to a radio frequency unit, RU (102; 500; 700), to indicate the RU (102; 500; 700) to adjust (S204, S205), based on the first allowable power, a bias voltage of a power amplifier, PA, corresponding to the carrier corresponding to the to-be-detected cell, characterized in that the method further comprises: if the load of the to-be-detected cell is greater than a second threshold, determining, by the BBU (101; 400; 600), a second allowable power of the carrier corresponding to the to-be-detected cell, wherein the second allowable power is equal to the maximum allowable power of the carrier corresponding to the to-be-detected cell, and the second threshold is greater than the first threshold; sending, by the BBU (101; 400; 600), the second allowable power to the RU (102; 500; 700), to indicate the RU (102; 500; 700) to adjust, based on the second allowable power, the bias voltage of the PA corresponding to the carrier corresponding to the to-be-detected cell; and after receiving a response message from the RU (102; 500; 700), canceling, by the BBU (101; 400; 600), an amplitude limitation performed on a power of the carrier corresponding to the to-be-detected cell, wherein the response message is sent by the RU (102; 500; 700) after the RU (102; 500; 700) completes adjusting the bias voltage. detecting, by a baseband unit, BBU (101; 400; 600), load of a to-be-detected cell; if the load of the to-be-detected cell is less than a first threshold, determining, by the BBU (101; 400; 600), a first allowable power of a carrier corresponding to the to-be-detected cell, wherein the first allowable power is less than a maximum allowable power of the carrier corresponding to the to-be-detected cell; and sending, by the BBU (101; 400; 600), the first allowable power to a radio frequency unit, RU (102; 500; 700), to indicate the RU (102; 500; 700) to adjust (S204, S205), based on the first allowable power, a bias voltage of a power amplifier, PA, corresponding to the carrier corresponding to the to-be-detected cell, characterized in that the method further comprises: if the load of the to-be-detected cell is greater than a second threshold, determining, by the BBU (101; 400; 600), a second allowable power of the carrier corresponding to the to-be-detected cell, wherein the second allowable power is equal to the maximum allowable power of the carrier corresponding to the to-be-detected cell, and the second threshold is greater than the first threshold; sending, by the BBU (101; 400; 600), the second allowable power to the RU (102; 500; 700), to indicate the RU (102; 500; 700) to adjust, based on the second allowable power, the bias voltage of the PA corresponding to the carrier corresponding to the to-be-detected cell; and after receiving a response message from the RU (102; 500; 700), canceling, by the BBU (101; 400; 600), an amplitude limitation performed on a power of the carrier corresponding to the to-be-detected cell, wherein the response message is sent by the RU (102; 500; 700) after the RU (102; 500; 700) completes adjusting the bias voltage. if the load of the to-be-detected cell is greater than a second threshold, determining, by the BBU (101; 400; 600), a second allowable power of the carrier corresponding to the to-be-detected cell, wherein the second allowable power is equal to the maximum allowable power of the carrier corresponding to the to-be-detected cell, and the second threshold is greater than the first threshold; sending, by the BBU (101; 400; 600), the second allowable power to the RU (102; 500; 700), to indicate the RU (102; 500; 700) to adjust, based on the second allowable power, the bias voltage of the PA corresponding to the carrier corresponding to the to-be-detected cell; and after receiving a response message from the RU (102; 500; 700), canceling, by the BBU (101; 400; 600), an amplitude limitation performed on a power of the carrier corresponding to the to-be-detected cell, wherein the response message is sent by the RU (102; 500; 700) after the RU (102; 500; 700) completes adjusting the bias voltage.