In the tide of criminal integration, the relationship between criminal law and criminal policy is getting closer and closer. As an important part of the application of criminal law, the interaction between criminal law interpretation and criminal policy is also increasingly frequent. Criminal policy, as a national strategy for crime prevention and a response mechanism for tackling crime problems, embodies the value concept of overview of the country. Only by following the purposeful guidance of criminal policy can criminal law play its due role, but this guiding function must be carried out under the restraint of the principle of legality of crime and the principle of balanced crime, while still considering the reality of criminal policy, only in this way can we realize the transformation to respond to criminal law and embody the requirements of a country ruled by law.