Through a questionnaire study of 544 employees from different organizations, this paper explores the influencing mechanism of performance appraisal politics on organizational citizenship behavior in Chinese culture adopting the statistical method of correlation analysis, structural equation and so on. The result shows that appraisee’s perception of appraisal politics has negative correlation with organizational citizenship behavior, and the perception of organizational support acts as full mediation in this negative relationship. In addition, Chaxu climate has a moderating role in the relationship between appraisee’s perception of appraisal politics and that of organizational support. Specifically, the more significant Chaxu climate in the organization is, the stronger the negative relationship is between appraisee’s perception of appraisal politics and that of organizational support, which results in less employee’s organizational citizenship behavior. Additionally, Chaxu climate doesn’t show much moderating effect between appraisee’s perception of appraisal politics and organizational citizenship behavior. The conclusion reveals the unique influencing mechanism of Chaxu climate on appraisee’s perception of appraisal politics, and provides important references for related research and practice.