本文认为，人的存在的本质属性是儒家人学思想得以建构和拓展的基点和核心。孟子通过严析人禽之别，揭释人心特征，阐发了对于理义道德和富贵物欲的追求，是人心所具有的社会心理趋向特征，而只有识得和践履理义道德，才能体现出人之所以为人而应具备的仁义礼智道德属性，这才是人的存在的本质属性。由此孟子具体指出了人的存在的行为准则和价值完善方法，认为个体只有自觉主动地遵循践履仁义礼智的道德规范，才能成就自身存在的价值，进而推动社会的发展 This paper argues that the essential attribute of human existence is the basic point and core of Confucian humanism thought construction and expansion. Mencius’s characterization of the human mind through a rigorous analysis of human beings and differences, elucidated the pursuit of righteousness and wealth and materialism, is the characteristics of the social psychology tend to have the heart, and only through knowledge and practice of morality, can reflect The reason why human beings should have the virtue and righteousness moral character, this is the essential attribute of human existence. Therefore, Mencius pointed out the code of conduct and the method of perfecting the value of man’s existence. He believed that only by consciously and initiatively following the moral standard of human beings and righteousness and righteousness, can individuals realize the value of their being and promote the development of society