As we all know, the combat effectiveness of the army is inseparable from the enthusiasm of the soldiers. The new law completely broke the shackles of traditional strength and established a complete military incentive system in the Qin State, making military exploits the only way to maintain family glory and improve social status. The greatest This mobilized the Qin people's enthusiasm for combat to the maximum extent. The link between "farming" and "war" is a strong and stable legal system, which fully guarantees social fairness. At that time, if the people of Qin wanted to gain a good social status in the country and win the respect of the world, they had only two things to do. One was to join the army, and the other was to devote themselves to agricultural production. This caused the best talents in the country to be concentrated in the army and agriculture. These two areas have led to the most direct development of Qin's core strength and a rapid increase in comprehensive national strength. In addition, Shang Yang's success is not an accident of history. The author believes that there are three main reasons for it: First, the monarchy of Qin State is strong. Although there were some internal struggles similar to other countries during the Spring and Autumn Period and the Warring States Period, the monarchy of Qin State still remained. It was unshakable. Qin Xiaogong was fully capable of launching a top-down institutional revolution, which laid a solid political guarantee for the reform. Secondly, Shang Yang's own attitude of winning the trust of the people, "No one can stand without trust." Since ancient times, politicians have regarded "trust" as a political means to dominate troubled times and create the political foundation for a prosperous era. "Small trust will lead to great trust, and a wise master is based on trust." Since the beginning of the Reform, Shang Yang has attached great importance to cultivating his own prestige. He started from the small matter of moving trees, and from small to large, he gradually established credibility, won the trust of the people, and Severely punishing the prince who violated the law demonstrated the fairness of law enforcement and won a broad mass base for the new law. Third, the characteristics of Qin culture. Qin is located at the intersection of Central Plains culture and Rongdi culture. The living conditions are difficult and the specific geographical environment has created the distinctive characteristics of Qin culture's inclusiveness. The Qin people have never been constrained by their own culture and are not exclusive of all favorable external factors. They not only actively absorbed the advanced civilization from the Zhou Dynasty, but also integrated into the Rong people through constant interactions and struggles with the Rong people. The utilitarian factors and the simple style of integrating the monarch and the people laid a good cultural foundation for the success of Shang Yang's reform.