Provided are a wireless communication method and device, which can improve communication performance and avoid damage to terminal hardware. The method comprises the following steps that a terminal device sends a first message to access network equipment, wherein the first message is used for carrying first capability information and/or first function parameter information, the first capability information is used for indicating the access network equipment to update the maximum communication capability of the terminal device into a first communication capability, and the first function parameter information is used for indicating the access network equipment to update a function parameter or a parameter range for communication of the terminal equipment into a first function parameter or aparameter range; and the terminal device receives a second message sent by the access network equipment, wherein the second message carries a function parameter or a parameter range configured for theterminal device by the access network equipment according to the first capability information and/or the first function parameter information.