Abstract: Language competence is the necessary quality of modern college students.But there are some existing problems of college student's interpersonal communication:speaking impropriely, telling lies, neglecting etiquette and so on.The college students should realize that cultivating language competence is very important.It should select the content, expression and mood based on the speaking object's identity and status; express the meaning based on the speaking object's age and characteristics of personality; select the different methods based on the speaking object's territory and job differences.