With an increasing number of students pursuing their tertiary studies overseas, ways to improve their adaptation into a new environment become of the utmost importance. By applying self-determination theory, the current research investigated the extent that a basic psychological need intervention can increase need-satisfying experiences and promote the adjustment of Mainland Chinese international students to college. In total, 55 participants were randomly assigned to an intervention or control condition. They completed questionnaires on basic need satisfaction and college adjustment before the start of the study, right after the completion of the intervention, and after a 5-week follow-up. Participants who received the intervention had significantly higher need satisfaction and adjustment to college than those in the control condition. The intervention effect was maintained after a 5-week delay. In addition, the results showed that the increases in psychological need satisfaction after the intervention predicted higher levels of students' adjustment to college. Theoretical implications for the universality of basic need satisfaction to students' well-being and practical implications for international education are discussed.