The embodiments of the present invention provide a power control method and a base station. The method includes: obtaining, by a base station, IN PUCCH (i), where the IN PUCCH (i) is average interference noise power of a physical uplink control channel (PUCCH) carried by radio resources that are allocated by the base station at a subframe i; and sending, by the base station, a parameter P 0_NOMINAL_PUCCH (i) for power control at the subframe i. In the embodiments of the present invention, the base station may send a more accurate parameter to a UE, so that PUCCH transmit power which is at the subframe i and calculated by the UE is more accurate, and network interference caused by increasing the PUCCH transmit power is further reduced.