A vehicle inspection system, comprising: - a radiation source for emitting beams of penetrating radiation; - an inspection passage enabling a vehicle to pass; - a dragging system comprising a first dragging means and a second dragging means, which are sequentially arranged along a vehicle dragging direction; in the vehicle dragging direction, the first dragging means is arranged at the upstream of the second dragging means and the dragging system is arranged in the inspection passage; and - the first and second dragging means (111;112) both include a supporting plate (1111,1121), an elongated traction element and a pushing element connected with the elongated traction element, the elongated traction elements of the first and second dragging means (111,112) are continuous and integrated, a separating section is arranged between the supporting plate of the first dragging means and the supporting plate of the second dragging means, so that the supporting plate of the first dragging means is separated from the supporting plate of the second dragging means by a preset distance in the vehicle dragging direction; the elongated traction elements and pushing elements extends on the separating section; the supporting plates (1111,1121) of the first and second dragging means (111,112) are separated and two pieces type; the vehicle inspection system further comprising: - a radiographic inspection system for inspecting a vehicle, wherein said radiation source is comprised in said radiographic inspection system; - a detector for receiving the beams emitted by the radiation source and penetrating through the inspected vehicle; wherein at least a part of paths of the beams of the radiographic inspection system passes through the separating section between the first dragging means and the second dragging means; the vehicle inspection system being characterized in that the vehicle inspection system has a first mode, a second mode and a third mode, and wherein under the first mode, the radiographic inspection system is able to not inspect the vehicle when the vehicle voluntarily passes the inspection passage, under the second mode, and the radiographic inspection system is able to inspect the vehicle by adopting a dosage lower than a first preset value when the vehicle passes the inspection passage, and under the third mode, the radiographic inspection system is able to inspect the vehicle by adopting a dosage larger than or equal to a second preset value when the dragging system drags the vehicle to pass the inspection passage. - a radiation source for emitting beams of penetrating radiation; - an inspection passage enabling a vehicle to pass; - a dragging system comprising a first dragging means and a second dragging means, which are sequentially arranged along a vehicle dragging direction; in the vehicle dragging direction, the first dragging means is arranged at the upstream of the second dragging means and the dragging system is arranged in the inspection passage; and - the first and second dragging means (111;112) both include a supporting plate (1111,1121), an elongated traction element and a pushing element connected with the elongated traction element, the elongated traction elements of the first and second dragging means (111,112) are continuous and integrated, a separating section is arranged between the supporting plate of the first dragging means and the supporting plate of the second dragging means, so that the supporting plate of the first dragging means is separated from the supporting plate of the second dragging means by a preset distance in the vehicle dragging direction; the elongated traction elements and pushing elements extends on the separating section; the supporting plates (1111,1121) of the first and second dragging means (111,112) are separated and two pieces type; - a radiographic inspection system for inspecting a vehicle, wherein said radiation source is comprised in said radiographic inspection system; - a detector for receiving the beams emitted by the radiation source and penetrating through the inspected vehicle;