The invention discloses a call information updating method for a trunking communication system terminal. The method comprises the following steps that: after entering a cell, a terminal executes the subsequent steps if not in a call state; the terminal decodes a message of a broadcast control channel (BCCH) to obtain a system message 1, obtains configuration parameters of a notification channel (NCH) from the system message 1, and starts NCH listening according to the configuration parameters; if a group call/broadcast is established, the terminal saves the information of the group call/broadcast at the terminal after listening to a group call/broadcast notification message transmitted in the NCH by a network; if the information of the group call/broadcast is changed, the terminal compares and updates the information of the group call/broadcast saved at the terminal after listening the group call/broadcast notification message transmitted in the NCH by the network; and the terminal displays the information of the group call/broadcast in real time, wherein the information comprises information on group number and information on whether the group call/broadcast is initiated by the terminal or not.