Cultural self‐efficacy refers to one's perception of his/her own capability to function effectively in situations characterized by cultural diversity. Cultural self‐efficacy is important in communication because it can promote the socio‐cultural adaption. Thus, it is significant to study Chinese college students' cultural self‐efficacy level and the influencing factors to improve cross‐cultural communication. The present study uses quantitative method, with 64 students from Hangzhou Normal University as participants, and designs a questionnaire to study students' level of cultural self‐efficacy as well as the influencing factors of it. The results of the study show that the mean score of CSE of Chinese college students is at limited level and more precisely, the dimension of learning and understanding a foreign language has the highest score. Meanwhile, within the five causing factors put forward by Bandura, intercultural experience, appraisal from other in the communication, and the observation of others' experiences all have possible influences on students' cultural self‐efficacy. At last, the author provides some relevant practical suggestions to better improve students' cultural self‐efficacy.