Abstract:The most fundamental measure to prevent corruption is to control its source, i.e. analysis of both external and internal causes of subjects. The corruption motivation as the internal impetus for the subjects' corruption exerts direct influence on the malversation. In this sense, it is of great significance to study such motivation for prevention of corruption from source. Through study, the author has found that the corruption motivation of behavioral agents are mainly influenced by earnings, cost and chances of corruption and their attitudes toward the malversation. Accordingly, in order to get rid of behavioral agents' corruption motivation, we have to adopt more severe punishment measures, perfect the supervision system of corruption and increase the agents' cognition of such malversation.