The invention relates to an object tracking method for an intensive scene based on multi-module sparse projection. The object characteristic is characterized by a sparse projection method; and for solving the serious mutual shield problem in an intensive scene, a reconstruction matrix based on a multi-module core color histogram is designed and further a corresponding object matching and updating algorithm is designed. According to the object tracking method, the automatic tracking of objects in the people stream intensive scene in a public place is realized; and meanwhile, the solution to the problem of serious mutual shield in the intensive scene is provided.