The current labor law of our country does not stipulate clearly whether the period of demurrage can be implemented for the employees who leave the company,and there are many disputes about whether the period of demurrage is legal in the current legal practice.With the rapid development of Knowledge Economy in the Contemporary Society,more and more employers attach importance to the protection of their own intellectual property rights,and strengthen the protection of their own business secrets by various means,such as release period,competition restriction and so on.We must attach great importance to the practical management of the trade secret release period in labor relations,and achieve an effective balance between the protection of the employer's trade secret and the workers'employment freedom.