Provided are a time synchronization packet processing method and device, which are applied to a time synchronization node. The processing method comprises: according to a change condition of received time source information, judging whether a time synchronization node tracking time source changes; and when the time synchronization node tracking time source changes, and after a predetermined time delay, sending to a downstream clock node a time synchronization packet parameter modified according to the change condition of the time source information. By distinguishing a change condition of time source information input by a time synchronization node, and when the change condition of the time source information changes a time synchronization node tracking time source, setting a certain delay time for changing and outputting a time synchronization packet parameter, the present invention avoids unnecessary downstream oscillation, and ensures the stable operation of a time synchronization network.