Methods for scheduling request (SR) transmission and a terminal device are provided. The method includes the following. When K SR configurations include a first SR configuration that satisfies a first preset condition, transmit first SR information corresponding to the first SR configuration through a first uplink channel, where K physical uplink control channels (PUCCHs) overlap with the first uplink channel, the K PUCCHs are configured to carry SR information corresponding to the K SR configurations, and K is a positive integer.