Abstract: Dewey opposed the dogmatic and rigid practice of deviating from experience in the choice of moral behavior,and put forward the concept of "moral imagination",which is the ability to make what is not present into being and to feel "what it is" from "what can be".Moral behavior cannot be separated from imagination,careful thinking,choice and other moral imagination,with the main purpose to understand the significance of immediate action and strive to increase the significance of immediate action,and to make moral behavior a dynamic and creative art.

Key words: Deway, choice of moral behavior, moral imagination, rehearsal of thought, Humanity and Behavior