Abstract: In the modern constitutional society,it is the basic principle to manage state affairs in accordance with the law,and the law plays an important role in resolving legal disputes and contradictions.To strictly fulfill the principle of rule of law,it is necessary to guarantee the unity of legal institution.The conflicts between laws frequently lead to the intensity of social disputes and conflicts,therefore,it is essential to guarantee the coordination and unity of laws based on the constitution.It is an important measure to examine the laws and rules which are unconstitutional.Though judicial review system has been established in our country,it has not fully played its role in maintaining the unity of legal institution due to the lack concrete process and mechanism.It is important to strengthen the mechanism of review of constitutionality to carry out the principle of managing state affairs in accordance with the law and accelerate the harmony of society.

Key words: review of constitutionality, legal dispute, constitutionality