Designing lesson plan is a necessary competence for teachers. Under the influences of new thoughts in teaching, the traditional fill-in approach lesson plan must be changed. The paper studies firstly the functions and applications of lesson plan, and discusses the theoretical bases, contents, styles of presentation, advantages and disadvantages of the traditional lesson plan. Next, I propose an alternative idea what is called the compositive approach, and introduce it's theoretical bases, criterions of design, basic concepts, contents, and essences of application.