Maintaining the unity of the legal system is one of the basic principles that must be adhered to in carrying out the record and review work.From a general perspective,implementing the principle of the unity of the legal system with the help of the record and review system is an inevitable requirement for enforcing the rule of law,developing the economy,and maintaining political stability.The factors such as the influence of Marxist legal unity thought,maintaining the centralized and unified leadership of the Party Central Committee,and reflecting on the neglect of legal history are the special necessity basis for the implementation of the principle of the unity of the legal system in the record and review.The core content of the principle of the unity of the legal system includes the supremacy of the Constitution,equality of all before the law,power restriction and supervision,and human rights protection.The implementation of this principle requires the establishment and improvement of the legal system,the unity of legal interpretation,and the unity of legal supervision.While unifying legal supervision,the record and review can promote the achievement of the unity of legal interpretation and the substantial optimization of the legal system,thus maintaining the unity of the legal system.In the future,the implementation of the principle of the unity of the legal system in the record and review should pay attention to coordinating the relationship between the central and local interest allocation,improving the linkage mechanism of the multiple and multi-level record and review system,and exploring unified review methods and procedures.