Abstract: The value of organizational ethics management has drawn much attention from the public. Meanwhile, the public has high expectation on leaders as moral examples. According to the evolution logic from environmental stimuli to the self-identity, this paper discusses the suppression mechanism of the moral influences of leaders on their subordinates based on approach-avoidance motivation theoretical framework. In this paper, it is believed that physical suppression, social undermining and recognition suppression are main obstacles that restrict the demonstrative influences of leaders' moral examples, and cause the "funneling effect" during the process of top-down effect of moral influence. According to the problems of the three major suppression mechanisms, a comprehensive function model to restrict the top-down effect of leaders' moral is established. Finally, the theoretical significance, management inspiration and directions for future studies are discussed.

Key words: top-down effect of leaders' moral example, physical Ssppression, funneling effect model, social undermining, recognition suppression