A method for adjusting a pre-distortion coefficient, comprising: adjusting a pre-distortion coefficient corresponding to a transmit power currently set by a transmitting end, wherein a baseband signal is pre-distorted by using the pre-distortion coefficient; analyzing a received signal quality report which is obtained according to the pre-distortion coefficient before adjustment and fed back by a receiving end and a received signal quality report which is obtained according to the pre-distortion coefficient after adjustment and fed back by the receiving end, to determine a variation situation of received signal quality of the receiving end; if the received signal quality of the receiving end becomes better, using the pre-distortion coefficient after adjustment as the pre-distortion coefficient corresponding to the transmit power currently set by the transmitting end, and then returning to the step of adjusting a pre-distortion coefficient corresponding to a transmit power currently set by a transmitting end; and if the received signal quality of the receiving end becomes worse, using the pre-distortion coefficient before adjustment as the pre-distortion coefficient corresponding to the transmit power currently set by the transmitting end (S 14); wherein the adjusting a pre-distortion coefficient corresponding to a transmit power currently set by a transmitting end is characterized in that it comprises: adjusting the pre-distortion coefficient corresponding to the transmit power currently set by the transmitting end to be a pre-distortion coefficient corresponding to the transmit power which is assumed to be increased by N adjustment steps, wherein N is the assumed number of increase times of the transmit power; or adjusting the pre-distortion coefficient corresponding to the transmit power currently set by the transmitting end to be a pre-distortion coefficient corresponding to the transmit power which is assumed to be decreased by N adjustment steps, wherein N is the assumed number of decrease times of the transmit power. adjusting a pre-distortion coefficient corresponding to a transmit power currently set by a transmitting end, wherein a baseband signal is pre-distorted by using the pre-distortion coefficient; analyzing a received signal quality report which is obtained according to the pre-distortion coefficient before adjustment and fed back by a receiving end and a received signal quality report which is obtained according to the pre-distortion coefficient after adjustment and fed back by the receiving end, to determine a variation situation of received signal quality of the receiving end; if the received signal quality of the receiving end becomes better, using the pre-distortion coefficient after adjustment as the pre-distortion coefficient corresponding to the transmit power currently set by the transmitting end, and then returning to the step of adjusting a pre-distortion coefficient corresponding to a transmit power currently set by a transmitting end; and if the received signal quality of the receiving end becomes worse, using the pre-distortion coefficient before adjustment as the pre-distortion coefficient corresponding to the transmit power currently set by the transmitting end (S 14); wherein the adjusting a pre-distortion coefficient corresponding to a transmit power currently set by a transmitting end is characterized in that it comprises: adjusting the pre-distortion coefficient corresponding to the transmit power currently set by the transmitting end to be a pre-distortion coefficient corresponding to the transmit power which is assumed to be increased by N adjustment steps, wherein N is the assumed number of increase times of the transmit power; or adjusting the pre-distortion coefficient corresponding to the transmit power currently set by the transmitting end to be a pre-distortion coefficient corresponding to the transmit power which is assumed to be decreased by N adjustment steps, wherein N is the assumed number of decrease times of the transmit power. adjusting the pre-distortion coefficient corresponding to the transmit power currently set by the transmitting end to be a pre-distortion coefficient corresponding to the transmit power which is assumed to be increased by N adjustment steps, wherein N is the assumed number of increase times of the transmit power; or adjusting the pre-distortion coefficient corresponding to the transmit power currently set by the transmitting end to be a pre-distortion coefficient corresponding to the transmit power which is assumed to be decreased by N adjustment steps, wherein N is the assumed number of decrease times of the transmit power.