In order to carry out the detection of the bore of the barrel, a new idea of the structure design of the bore sniffing collector is put forward. The method of electronic component is used to obtain the panoramic image of the barrel of the gun barrel, and a four-head crank-chain bracket structure is designed. The four-channel CCD camera array is arranged in the axial direction. Each camera is the tube wall to obtain 90 degree field of view, complete the bore radial panoramic shooting. The calculation and analysis results show that the design satisfies the requirements of caliber and field of view, and the image quality is high and the distortion is small. The video flow of each camera is independent and efficient, and the efficiency of the traditional structure is improved greatly and the performance is good.