Disclosed by embodiments of the present disclosure are a method for processing a relax measurement parameter update, a terminal device, and a computer-readable storage medium. When a network device changes a relax measurement configuration parameter in system information, the terminal device may still independently determine the use of a new relax measurement configuration parameter according to its own conditions, which perfects protocol implementation and allows the terminal device to have more reasonable performance. The method in the embodiment of the present disclosure includes: receiving, by the terminal device, the system information sent by the network device, the system information including a current relax measurement configuration parameter; under the condition that the current relax measurement configuration parameter is different from a previous relax measurement configuration parameter, when current information of the terminal device meets a preset condition, performing, by the terminal device, first parameter update processing.