Embodiments of the present application disclose are a power control method and a terminal apparatus. The method comprises: a terminal apparatus receiving downlink control information (DCI) sent by a network apparatus and used for scheduling a physical uplink shared channel (PUSCH), the DCI comprising a first sounding reference signal (SRS) resource indication; the terminal apparatus determining, according to the DCI, an uplink power control parameter value corresponding to the first SRS resource indication; and the terminal apparatus controlling, according to the uplink power parameter value corresponding to the first SRS resource indication, actual transmit power of first uplink data carried by the PUSCH and corresponding to the first SRS resource indication. The method, the terminal apparatus, and the network apparatus of the embodiments of the present application facilitate an improvement in spectral efficiency.