A method for joint channel correction among multiple radio remote units, RRUs, which is used for joint channel correction among multiple RRUs in a communication system, the communication system at least comprises a first RRU and a second RRU, wherein the method comprises: performing (301, 501) a self-correction to the first RRU and acquiring a first self-correction coefficient; transmitting (302, 502) a first correction signal to a second antenna of the second RRU through a first antenna of the first RRU, wherein the first correction signal is received by the second RRU through the second antenna; and receiving a second correction signal through the first antenna, wherein the second correction signal is transmitted to the first antenna through the second antenna; acquiring (303, 503) a first compensation coefficient according to a first channel response acquired by receiving the second correction signal; acquiring (304, 504) a first correction coefficient according to the first compensation coefficient and the first self-correction coefficient; wherein the first self-correction coefficient comprises a first transmitting self-correction coefficient and a first receiving self-correction coefficient of each service channel of the first RRU, the first correction coefficient comprises a first transmitting correction coefficient and a first receiving correction coefficient of each service channel of the first RRU; wherein the first correction signal is product of a correction reference sequence and the first transmitting self-correction coefficient of a service channel corresponding to the first antenna, the second correction signal is product of the correction reference sequence and a second transmitting self-correction coefficient of a service channel corresponding to the second antenna. performing (301, 501) a self-correction to the first RRU and acquiring a first self-correction coefficient; transmitting (302, 502) a first correction signal to a second antenna of the second RRU through a first antenna of the first RRU, wherein the first correction signal is received by the second RRU through the second antenna; and receiving a second correction signal through the first antenna, wherein the second correction signal is transmitted to the first antenna through the second antenna; acquiring (303, 503) a first compensation coefficient according to a first channel response acquired by receiving the second correction signal; acquiring (304, 504) a first correction coefficient according to the first compensation coefficient and the first self-correction coefficient; wherein the first self-correction coefficient comprises a first transmitting self-correction coefficient and a first receiving self-correction coefficient of each service channel of the first RRU, the first correction coefficient comprises a first transmitting correction coefficient and a first receiving correction coefficient of each service channel of the first RRU; wherein the first correction signal is product of a correction reference sequence and the first transmitting self-correction coefficient of a service channel corresponding to the first antenna, the second correction signal is product of the correction reference sequence and a second transmitting self-correction coefficient of a service channel corresponding to the second antenna.