The paper is on communicative competence from sociolinguistic perspective. Firstly the author introduces the concept of competence by Chomsky and communicative competence by Hymes and further analysis of communicative competence by Canale and Swain. To succeed in cross culture communication, the interlocutors should be equipped with social culture and sociolinguistic abilities. At the same time, the problems with cross-culture communication are also identified. Lack of real communicative environment and most of foreign language learning is in the classroom. It’s important for instructors to remedy the situation. Practical solutions to those problems are also proposed, Role-play is particularly effective in drawing learner’s attention to soc...