Provided are a method for information feedback, a terminal device and a network device. The method comprises: a terminal device receives first DCI; the terminal device receives second DCI after the first DCL, the downlink channel corresponding to the first DCI and the downlink channel corresponding to the second DCI belonging to the same channel group, the first DCI and the second DCI comprising a time information field, the time information field indicating the time for sending feedback information of the channel group, and the time indicated by the time information field in the first DCI and the time information field in the second DCI being different; and, on the basis of the second DCI, the terminal device determines time information for sending feedback information of the channel group.