A feedback information transmission method and apparatus, a device, and a medium are provided. The method includes: receiving at least one piece of transmission information transmitted on at least one physical sidelink channel, where one piece of transmission information is transmitted on each physical sidelink channel; determining power information corresponding to each of at least one piece of feedback information that corresponds to the at least one piece of transmission information; and transmitting corresponding feedback information on at least one physical sidelink feedback channel resource based on the power information corresponding to each piece of feedback information.