An uplink transmission power control method, comprising: determining, by a user equipment, whether uplink channels are simultaneously transmitted over adjacent subframes between multiple carriers; wherein the adjacent subframes between the multiple carriers are partially overlapped; and timing advance values of the multiple carriers are different; and if uplink channels are simultaneously transmitted over adjacent subframes between multiple carriers, processing, by the user equipment, an uplink channel transmitted over the last symbol on a partially overlapped subframe of another carrier except a carrier having the greatest timing advance value, so that total transmission power of the uplink channels is lower than the maximum transmission power of the user equipment; wherein the processing, by the user equipment, an uplink channel transmitted over the last symbol on a partially overlapped subframe of another carrier except a carrier having the greatest timing advance value comprises: determining, by the user equipment, whether the total transmission power of the uplink channels exceeds the maximum transmission power of the user equipment, and if the total transmission power of the uplink channels exceeds the maximum transmission power of the user equipment, processing the uplink channel transmitted over the last symbol on the partially overlapped subframe of the another carrier except the carrier having the greatest timing advance value. determining, by a user equipment, whether uplink channels are simultaneously transmitted over adjacent subframes between multiple carriers; wherein the adjacent subframes between the multiple carriers are partially overlapped; and timing advance values of the multiple carriers are different; and if uplink channels are simultaneously transmitted over adjacent subframes between multiple carriers, processing, by the user equipment, an uplink channel transmitted over the last symbol on a partially overlapped subframe of another carrier except a carrier having the greatest timing advance value, so that total transmission power of the uplink channels is lower than the maximum transmission power of the user equipment; wherein the processing, by the user equipment, an uplink channel transmitted over the last symbol on a partially overlapped subframe of another carrier except a carrier having the greatest timing advance value comprises: determining, by the user equipment, whether the total transmission power of the uplink channels exceeds the maximum transmission power of the user equipment, and if the total transmission power of the uplink channels exceeds the maximum transmission power of the user equipment, processing the uplink channel transmitted over the last symbol on the partially overlapped subframe of the another carrier except the carrier having the greatest timing advance value. determining, by the user equipment, whether the total transmission power of the uplink channels exceeds the maximum transmission power of the user equipment, and if the total transmission power of the uplink channels exceeds the maximum transmission power of the user equipment, processing the uplink channel transmitted over the last symbol on the partially overlapped subframe of the another carrier except the carrier having the greatest timing advance value.