On the basis of criticizing Dühring's eclecticism in his Anti-Dühring, Engels scientifically and systematically discussed Marxist morality from historical materialism, and elaborated on the roots, basic connotation and fundamental characteristics of morality. It is of far-reaching practical significance to analyze the thesis on moral thought in the Anti-Dühring, to grasp its rich connotation, to deeply understand its contemporary value, and to use it to guide the practice of moral construction in contemporary China, to improve the moral quality of all people, and to strengthen the construction of spiritual civilization in the new era.