College students often have insufficient interpersonal experience before enrollment and limited interpersonal interaction after enrollment. Group tutoring based on class units has the advantages of organizational convenience, authenticity of relationships, and replicability of experiences. At the same time, group tutoring based on class units has limitations such as large scale and limited venues. The guarantee of material conditions can promote the gathering of groups, and the professional competence of group led teachers can ensure that the group does well. From the perspective of the practical effect of group work on a class basis, class members enjoy mutual understanding, support, warmth, and trying to change. It can effectively enhance the cohesion of the class, form a sense of security among members, and enhance individual confidence. It has the function of transforming “familiar strangers” into “approachable families”.