The invention provides an object tracing method based on active scene learning, belonging to the technical field of computer graphics and image mode identification. The difficulty needing to be confronted all together is to not only guarantee the adaption ability of a tracing system to the target change, but also guarantee the learning accuracy to avoid shifting to result in tracing failure. According to the invention, the object tracing is achieved by the steps of online modeling, short-time tracing, overall detection, active scene learning, a constraint method, analysis and extraction of a motion area and the like. By learning a scene online, the background information can be found actively, meanwhile, the motion area analysis and extraction method based on light streams is provided, and the problem of target loss and difficulty in recovering the target, resulting from rapid movement of an objected or severe movement of the scene, can be effectively solved according to the structured constraint. The adaption ability to the target change can be effectively improved, so that the long-time stable rapid object tracing can be achieved, and the object tracing method is mainly applied to various object tracing occasions.