Purpose: The purpose of this study was to explore the relationships among collegiate cheerleader's weight pressure, social physique anxiety, perceived competence, self-determined motivation and dropout intention and to predict social physique anxiety by weight pressure. Methods: Participants were 428 collegiate cheerleaders. The measurements comprised demographic questionnaire, weight pressure scale, social physique anxiety scale, perceived competence scale, sport motivation scale, and dropout intention scale. Results: Weight pressure could predict social physique anxiety, especially from peers. Weight pressure fostered social physique anxiety and social physique anxiety would reduce perceived competence. Perceived competence would not just affect self-determined motivation and then destroy dropout intention but reduce dropout intention directly. Conclusion: The findings supported the proposed model. Perceived competence and self-determined motivation would be mediate variables on the relationship which weight pressure, social physique anxiety influence dropout intention. Weight pressure from peers is the significant predictor for social physique anxiety. At last, this study provides advices for collegiate cheerleaders who might face psychological problems.