The invention discloses a highway traffic safety warning system comprising a data base layer, a calculation processing layer and an output application layer. The data base layer, the calculation processing layer and the output application layer are electrically connected in sequence. The data base layer includes a data acquisition module and a special data monitoring module. The calculation processing layer includes a database management module and a safety warning model module. The output application layer includes a client management interface and an instruction sending and managing module. The highway traffic safety warning system of the invention can provide more effective accident warning and disposal service for the dangerous sections of the highway, and can achieve a good service effect and good social and economic benefits.