This paper, by means of the research methods of questionnaire, literature and so on, probes into the reasons that cause the differences in the level and types of interpersonal communication between the impoverished and nonimpoverished undergraduates from the perspective of social psychology. It also proposes suggestions on improving interpersonal relationship of the impoverished undergraduates. The results show that: (1) The interpersonal relationship of nonimpoverished undergraduates is superior to that of impoverished ones. (2) At the dimensions of the types of interpersonal communication, there has a significant difference in the initiative, open and normative: the impoverished undergraduates are not better than nonimpoverished ones in initiative and open, but they are better than the nonimpoverished undergraduates in normative. (3) Giving more social support to impoverished undergraduates is an important condition to raise their selfconfidence and improve their interpersonal relationship.