The present invention discloses a signal polarization method, apparatus and system, and relates to the field of cellular network technologies. At the time of adjusting a polarization manner of a signal, an antenna does not need to be replaced, and a physical installation posture of the antenna does not need to be adjusted manually either. Therefore, a manual requirement and an operation cost are reduced, a workload, work risk and time are reduced, and a normal operation of a service of a cell is ensured. The signal polarization method provided in the embodiments of the present invention includes: receiving physical channel signals sent by a base transceiver station; determining a polarization manner of each physical channel signal; and polarizing, by adjusting at least one of an amplitude and a phase of each physical channel signal, the physical channel signals according to the polarization manner.