Whether according to origin or essence Confucian ethics expresses mainly sensual emotional ethics，and expresses firstly family ethics. Western ethics（especially western traditional ethics）belong mainly to rationalist ethics in spite of it also has some emotional ethics. Therefore the emotional feature of Confucian ethics is fundamental characteristics that it differents from western ethics. There are a difference between emotional ethics and rationalist ethics，that is，former has small extension and rich content，and the latter has larger extension and poor content. To a certain extent these differences brings about another difference that emotional ethics has dissimilarity in the treatment of ethics object and rationalist ethics can be just in treatment of ethics objects. Along with China’s economic rise，Confucian ethics will has greater and greater influence to international society. It emotional feature unlike western rationalist ethics will decide it has what kind of positive effect to world civilization and human values as well as its limitation of effect.