The present invention provides a method for tracking a moving object by using multiple cameras. Based on the method for tracking a object by using a single camera, multiple cameras are used in the present invention to track at the same the moving object in the same region from varied perspectives, and the object which is sheltered from a single perspective is identified and positioned. The method comprises: firstly determining a public planar area in an image of each camera as a primary plane of the image of each camera, calculating a homographic matrix between the principal planes, using the principal plane of the image of the camera where the weight of a sheltered object is the maximum as a mapping principal plane, and performing homographic mapping, by other cameras, to the mapping principal plane. Tracking information of the object with the maximum sheltered weight is acquired by using the object tracking information of the image of other cameras and using the homographic relationship. According to the present invention, the problem that object tracking fails in cases of sheltered objects, and accuracy rate of tracking target is improved.