The invention provides a wireless communication terminal and a software updating method thereof. The software updating method comprises the following steps of: when judging that a useful content to be updated exists, sending a short message to the wireless communication terminal by using a point-to-point short message downloading function of STK (SIM Tool Kit) in an SIM (Subscriber Identity Module) card through a server; and triggering an updating operation by the wireless communication terminal according to the received short message so that software of the wireless communication terminal is updated. According to the wireless communication terminal and the software updating method, provided by the invention, all the updating operations are transparent to users; an operator server automatically updates user information and sends update prompts; and URL (Uniform Resource Locator) is updated through the function of the STK. Therefore, the wireless communication terminal and the software updating method are beneficial to reducing labor cost of operators and further reducing incorrect manipulations of the users.