Early warning system and vehicle are opened to door

The utility model relates to an early warning system and vehicle are opened to door, including the treater, suggestion device in the car be connected with the treater respectively, an environmental sensor, the second environment sensor, outer suggestion device of first car and the outer suggestion device of second car, the outer suggestion device setting of an environmental sensor and first car isat the locomotive of vehicle, comprises a processo, an environmental sensor is used for gathering a first environmental information who presets the within range at locomotive place, the second environment information of within range is predetermine to the second that the second environment sensor is used for gathering rear of a vehicle place, the treater is expressed firstly when presetting the within range and having the barrier at an environmental information, trigger in the car suggestion device and the outer suggestion device of first car and send the information, when having the barrierin the within range is pre