Vehicle radiation imaging detection system

The utility model discloses a vehicle radiation imaging detection system, wherein personnel in vehicles do not need to get off and the vehicles rapidly pass through a detection channel. The vehicle radiation imaging detection system comprises a rack, wherein a ray source, a front collimator and an array detector are installed on the rack; the detection channel is formed between the front collimator and the array detector, wherein the front collimator with a large collimation ratio is used for collimating a ray into a fan-shaped ray beam with a very small penumbral region width, and enabling the umbral region width to be matched with the ray incident window width of the array detector, thus effectively utilizing an umbral region ray for scanning imaging, improving image quality, reducing the irradiation of a penumbral region ray and scattered rays on the personnel in the vehicles, and greatly reducing the exposure dose of the passengers. The system is low in detection dose, simple in structure, small in floor area, small in radiation safety control region, and suitable for high-pass-ratio rapid safety check for vehicles at common road mounts, security checkpoints, customs passages, vehicle entrances-exits in important places, and the like.