A method for information transmission includes that: the terminal device receives first information from a network device through a first time-domain resource on a first carrier, where the first time-domain resource is in a first downlink transmission burst and the first information is used to indicate time-domain resource information of a first transmission burst according to a first subcarrier spacing, and the first carrier is an unlicensed carrier; and the terminal device determines the time-domain resource information of the first transmission burst according to the first information, and the first carrier is an unlicensed carrier.