Buddhism ethics essentially is harmonious ethics. Harmonious thought is very important in Chinese Buddhism ethics. The theory of dependent origination is the foundation of moral philosophy in Buddhism ethics. Moral harmony of heart is the root of Buddhism ethics. Because of outer development of heart,and the difference of exist modes in the relations of human,society and nature,Buddhism ethics represents moral harmony of human and human or moral harmony of human and nature,which have rich bioethics contents and thoughts. Harmonious thought in Buddhism ethics is one of the very important thought resources in the course of constructing Chinese bioethics.