Political powerman Mahathir led the Pakatan Harapan to win the national election and finally enabled Malaysia to achieve political party rotation at 9 May 2018. The direct reason for the victory of the Pakatan Harapan are that，the split of the Malays because of the competition of the Malay political parties，the centrifugal force of the people because of the long-term government corruption and the leadership of Mahathir for the opposition coalition. The political development after general election，the end of intimidation politics under UMNO will eliminate the gap between ethnic groups，however，the vertical division and the horizontal division of society will lead to the intensification of political fragmentation；The initial formation of the two-line system will promote the loosening of authoritarian politics to a certain extent；at the same time，the development of political party types will also have a certain impact on the development of political party and democratization in Malaysia. Although Malaysia’s political development has a tendency to move towards democratization，there are still some hidden concerns about its future development.