An imbalanced area pilot frequency transmission power enhancement method and a base station are provided. In accordance with the transmission power and increment of a main public pilot frequency channel prior to power enhancement, post-power enhancement main public pilot frequency channel transmission power is obtained. The transmission power of a downlink traffic channel is the same as transmission power prior to power enhancement. In accordance with the transmission power of the main public pilot frequency channel prior to power enhancement, the downlink traffic channel transmission power is also obtained. The post-power enhancement main public pilot frequency channel transmission power and the downlink traffic channel transmission power are used to transmit data in the main public pilot frequency channel and the downlink traffic channel, respectively.