The advantage is the perfect combination of etiquette and law, thus achieving the purpose of governing the country. This is the contemporary reference value of pre-Qin Confucian political and moral thoughts for the combination of ruling the country by virtue and ruling the country by law. Xunzi's emphasis on etiquette and law, to some extent, is advocating the importance of etiquette in governing the country, and has not ignored the important significance of law in governing the country. Therefore, Xunzi's political and moral thought is to better apply the interaction of etiquette and law to governing the country in order to achieve the purpose of governing the country. Another value of pre-Qin Confucian political and moral thought is to strengthen the combination of etiquette and law, and better apply the combination of morality and law to governing the country by virtue. The combination of etiquette and law does not require politicians to implement etiquette and law together, but to pay attention to the combination of etiquette and law, and use etiquette when it is used, so as to better achieve the purpose of governing the country. Confucius attached importance to the role of etiquette in governing the country, but did not attach great importance to the significance of law in governing the country, but he did not deny that Confucius also admitted that law had a certain positive role in governing the country. When Mencius advocated the thought of kingly way, he criticized the deficiency of its opposition hegemony, that is, it could not reach the opposition of the people. It can be seen that Mencius believes that if we blindly emphasize the role of law in governing the country, we will lose the hearts of the people and fail to achieve the purpose of governing the country. Therefore, between the rule of etiquette and the rule of law, Mencius chose to use the rule of etiquette to assist the rule of law first. Xunzi, on the other hand, is a master of the combination of etiquette and law, and advocates the combination of etiquette and law to govern the country. In order to better govern the country, this is also a requirement for politicians. In short, the pre-Qin Confucian political and moral thought emphasized the role of ceremony in politics, rather than ignoring the positive value of law in politics, so it began to combine ceremony and law as its political concrete means. In this way, the political and moral thoughts of Confucius, Mencius and Xunzi have been continuously inherited and developed by later generations, and the beneficial elements have been continuously utilized. The combination of etiquette and law is to coordinate the general plan of governing the country and make better use of etiquette and law in contemporary state governance.