This application provides an information transmission method and an apparatus. The method includes: A first network device receives an overheating message sent by a terminal device, where the overheating message includes overheating assistance information, and the overheating assistance information is used to indicate whether the terminal device is overheated; the first network device determines a second message based on the overheating assistance information, where the second message is used to indicate a second network device to adjust a communications parameter configured for the terminal device; and the first network device sends the second message to the second network device. When the terminal device is overheated, a secondary node can configure a proper communications parameter for the terminal device to resolve an overheating problem. After the overheating problem of the terminal device is resolved, a master node may further notify the secondary node that the overheating problem of the terminal device is resolved.