Communicative approach emphasozes on cultiivating the appplication ability by the process of communication that has been intorduced and accepted by more English teacher. They use it consciously in their teaching. Their teaching practice proves that communicative apporach is an effective teaching method ,by which we can help students obtain the fundamental English knowledge and the ability of listening ,speaking,reading and writing. This essay discusses the theory and principle of communicative approach and probiems in applying this gppd teaching method in schools.