In the information transmission method provided in this disclosure, a terminal device receives downlink control information. The downlink control information includes first information, and the first information indicates an uplink control channel resource for carrying uplink control information. The uplink control channel resource belongs to a first uplink control channel resource set, and the first uplink control channel resource set includes at least two uplink control channel resources that correspond to different quantities of symbols, or includes at least two uplink control channel resources that correspond to different quantities of resource blocks. The terminal device sends uplink control information to a network device by using the uplink control channel resource.