The invention discloses a method and a device based on ADS-B which can expand the monitoring range of a plane, provides an information processing method which is based on ADS-B information and is used for expanding the dynamic monitoring range of a plane and a device thereof. The method acquires air traffic information of various planes by analyzing ADS-B information and GNSS information received by the plane and timely updates the mark and position information of the plane, calculates and judges the present status of the plane; when any other plane that does not communicate with the plane appears in the monitoring range, the plane enters a forwarding status, at the moment, the plane chooses a time slot from forwarding time slots to forward the ADS-B information of the other plane, so as to achieve the goal of expanding the dynamic monitoring range of the plane. The method and the device of the invention wholly depend on air-borne electronic equipment of the plane and a satellite navigated receiver, is a self-organized and cooperative plane dynamic monitoring proposal, and especially suitable for the aviation crossing ocean or under severe environmental condition.