Mongolia has reformed its original socialist system in 1990，introduced democratic principles and transferred its planned economy to a market economy. As a legal basis for implementing these reforms，a new Constitution was enacted in 1992. Over the past period，Mongolia has completed the reform of state，social，economic，cultural，cultural and foreign relations institutions in accordance with the Constitution，established new state institutions，and gradually implemented the revision of laws. The constitutional amendment adopted by the Mongolian Parliament in 2019 is significant because it reinforces the successful experience of the 1992 Constitution and 2000 Constitution，and corrects relevant clauses that are not in line with reality. In other words，the amendment of the Constitution has made a great contribution to improving the parliamentary system and guaranteeing the people’s participation in the political power.