This application provides an information transmission method and a device. The method includes: obtaining, by a terminal device, resource configuration information, where the resource configuration information is used to indicate a resource used by the terminal device to send a scheduling request; sending, by the terminal device, the scheduling request to a network device on the resource indicated by the resource configuration information, where a preset correspondence exists between a sequence carried in the scheduling request and an amount of uplink data that is requested to be sent by the terminal device to the network device.