Abstract: By employing college students interpersonal communication efficacy scale and a self-made college students communicative skills questionnaire, 946 college students were subjected to a survey to investigate the effects of some larithmic factors upon their interpersonal communication efficacy. The results indicate that: the better the communicative skills, the higher the communication efficacy will be; the communication skills have direct influence upon students’ communicative efficacy, while factors like the personal feature and family background have some indirect influence in this regard.