There are different views on the role of legalism after reunification. Many people think that the demise of Qin State was caused by the legalism of Qin State. I don't agree with this. There are complicated reasons for the demise of Qin State, which are attributed to the lack of evidence to prove that the legalist thought of Qin State led to the rapid demise of Qin State.

The author thinks that the implementation of legalist thought is necessary in the social situation at that time, and it is an inevitable reflection of the thought of Qin empire, which has positive significance and plays a certain role in maintaining the unity at that time and promoting the social development in the future. Therefore, it is necessary to re-evaluate the legalist thought after Qin's reunification and restore its true colors.