A transceiver, comprising a power division module and at least two paths of signal transceiving and processing devices, each path of signal transceiving and processing device comprising a transceiving shared attenuation module, a transceiving shared phase shift module and a transceiving front-end processing module, wherein the transceiving shared attenuation module is connected to the power division module, and is configured to attenuate a received or to-be-transmitted signal; the transceiving shared phase shift module is connected to the transceiving shared attenuation module, and is configured to adjust a phase of the received or to-be-transmitted signal; and one end of the transceiving front-end processing module is connected to the transceiving shared phase shift module, and the other end of the transceiving front-end processing module is configured to be connected to an antenna for receiving or transmitting a signal; wherein the transceiver further comprises an apparatus for calibrating a receiving channel, and the apparatus comprises: a first setting module, configured to set an amount of attenuation for a signal transmitting device in one path of signal transceiving device as 0, and set amounts of attenuation for signal transmitting devices in other paths of signal transceiving devices as a supported maximum value; a first acquisition module, configured to acquire a phase value of a signal received by a signal receiving device in each path of signal transceiving device by controlling the signal transmitting device in the one path of signal transceiving device to transmit a signal and respectively controlling the signal receiving device in each path of signal transceiving device to receive the signal; and a first processing module, configured to respectively determine a phase difference between the phase value of the signal received by each signal receiving device and a phase value of a signal received by each of other signal receiving devices, and respectively compensate the phase difference to the transceiving shared phase shift module corresponding to each path of signal transceiving device. the transceiving shared attenuation module is connected to the power division module, and is configured to attenuate a received or to-be-transmitted signal; the transceiving shared phase shift module is connected to the transceiving shared attenuation module, and is configured to adjust a phase of the received or to-be-transmitted signal; and one end of the transceiving front-end processing module is connected to the transceiving shared phase shift module, and the other end of the transceiving front-end processing module is configured to be connected to an antenna for receiving or transmitting a signal; wherein the transceiver further comprises an apparatus for calibrating a receiving channel, and the apparatus comprises: a first setting module, configured to set an amount of attenuation for a signal transmitting device in one path of signal transceiving device as 0, and set amounts of attenuation for signal transmitting devices in other paths of signal transceiving devices as a supported maximum value; a first acquisition module, configured to acquire a phase value of a signal received by a signal receiving device in each path of signal transceiving device by controlling the signal transmitting device in the one path of signal transceiving device to transmit a signal and respectively controlling the signal receiving device in each path of signal transceiving device to receive the signal; and a first processing module, configured to respectively determine a phase difference between the phase value of the signal received by each signal receiving device and a phase value of a signal received by each of other signal receiving devices, and respectively compensate the phase difference to the transceiving shared phase shift module corresponding to each path of signal transceiving device. a first setting module, configured to set an amount of attenuation for a signal transmitting device in one path of signal transceiving device as 0, and set amounts of attenuation for signal transmitting devices in other paths of signal transceiving devices as a supported maximum value; a first acquisition module, configured to acquire a phase value of a signal received by a signal receiving device in each path of signal transceiving device by controlling the signal transmitting device in the one path of signal transceiving device to transmit a signal and respectively controlling the signal receiving device in each path of signal transceiving device to receive the signal; and a first processing module, configured to respectively determine a phase difference between the phase value of the signal received by each signal receiving device and a phase value of a signal received by each of other signal receiving devices, and respectively compensate the phase difference to the transceiving shared phase shift module corresponding to each path of signal transceiving device.