Moving target detection is a research hotspot in computer vision, image processing and other related fields. The core is to study and process each frame of image in video image. The main research idea of this paper is to compress and sample the two-dimensional image of each frame into a one-dimensional signal with a small amount of information, and reconstruct the image. Finally, the moving target extraction is performed on the image of each frame by the target detection technique. Simulation experiments show that the method is feasible and effective, and can greatly reduce the amount of data recorded in the target detection, and solve the problem of storage and transmission of massive data.