Abstract: During the 10 years since the implementation of the free education policy for normal university students, the outstanding problems of teachers with low basic education and lack of highly qualified teachers have been gradually solved. However, during the policy implementation process, it is easy for teachers and students to break the contract, the agreement is blocked and the contradictions in Free Education Practice are overridden prominently. By analyzing the facts of default, we can clarify the causes of breaking a contract, termination and contradiction, and make a legal analysis of the free education policy, which can provide the legal basis for the establishment of the withdrawal mechanism of free normal students. Finally, some implementation suggestions are put forward for establishing the exit mechanism so as to improve the free education policy for normal university students.