The invention provides a self-adaption air barrier used for a driving bridge.The self-adaption air barrier comprises supporting stand columns which are distributed in the longitudinal direction of the bridge at intervals, arranged on the two sides of the bridge and fixedly connected to the bridge.At least one self-adaption deformation plate which is used for blocking air pressure and changing the ventilation rate and the air flow direction through elastic deformation of the self-adaption deformation plates is arranged between every two adjacent stand columns.Deformation spaces used for elastic deformation of the self-adaption deformation plates are reserved around the self-adaption deformation plates.The self-adaption deformation plates are assembled on the supporting stand columns through supporting transverse rods.The influences of air loads on the bridge and vehicles can be comprehensively optimized and controlled, and operation safety of the bridge and the vehicles and driving comfort are ensured.Compared with an existing air barrier with the mechanically-controlled ventilation rate, the self-adaption air barrier can be more intelligent, simpler, safer, more convenient to use and capable of achieving economization and environmental protection.