This paper has introduced a method with the canonical equations to solve the central force problem ,derived the Law of conservation of angular momentum (mh=constant) and the Law of conservation of machinery energy (E=constant) and the orbit equation of the particle .Existing methods solving of the orbit equation with Binet equation usually do not provide a specif-ic form of integral constants .UsedEandh ,we have determined the integral constant .So ,the orbit equation solved by methods of the Law of conservation and the Binet equation has a unified form .It is useful for students understanding...