The invention discloses an expressway wireless alarm system. The expressway wireless alarm system comprises terminals, front-arranged wireless communication modules, rear-arranged wireless communication modules, a display unit and a central control center, wherein the terminals are connected with the front-arranged wireless communication modules, the front-arranged wireless communication modules are connected with the rear-arranged wireless communication modules, the rear-arranged wireless communication modules are connected with the display unit and the central control center, and the terminals are used by toll stations for sending alarm information or safety information and are installed in monitoring rooms of all the toll stations on an expressway. The expressway wireless alarm system has the advantages that the alarm information or the safety information is analyzed and recorded, station numbers of the toll stations sending the alarm information, the emergency degrees of alarm events, the names of the alarm events and alarm time or station numbers of the toll stations sending the safety information are displayed on an electronic map, and meanwhile the alarm information is uploaded to a relevant functional department to be processed. The expressway wireless alarm system has the advantages of being high in information sending speed, free of distance limitation, easy to operate and the like.