Abstract: Reproductive cloning technology of human being brings various ethical disputes and worries.Firstly,human cloning reflected the sharp confrontation between instrumental rationality and value rationality.Secondly,human cloning reflected the conflict between utility and morality.Thirdly,human cloning embodied the fierce intension between scientific freedom and human morality.Lastly,human cloning exposed the anxiety between technological progress and ethical reform,which especially calls for our calm ponder.

Key words: human cloning, rationality conflict, value dispute, ethical reform