TV drama is not only one kind of production of culture but also a movement of communication.What are the factors which influence the success of a TV drama in the market as one cultural format of mass production,communication and consumption? This paper focuses on the most popular TV drama Dwelling Narrowness in 2009 to study the communication of TV drama.Based on Lasswell`s classical model of communication,the paper first analyzes the four factors in communication of TV drama from the microscopic level,such as communicator,content,channel and audience of TV drama.Then it abstracts the systemic model of communication of TV drama from macroscopic level,discusses many issues associated to communication of TV drama,and provides a new,general approach to understand the production and communication of TV drama.