The enactment of the Danish law is a milestone in the history of law in Denmark and even in Northern Europe, marking the beginning of the evolution of the Danish legal system from medieval law to a modern legal system. The problem that plagued Danish economic development and centralization was resolved. The contradiction between the civil law represented by Scanian Law and the law of the Jyske Lov was solved by the Danish law of Christian V, and for centuries The law has also been systematically organized and improved. From the Supreme Court in Copenhagen to the countryside in Jutland, everyone benefits from the simplicity, clarity and rigor of Danish law. The Danish judicial area was previously divided into Jutland and Zealand, which triggered a series of confusing issues that were resolved after the Danish law was enacted. It is undeniable that the codification of Danish law has the purpose of establishing royal prestige by Frederick III and Christian V, but the progressive nature of Danish law cannot be denied. The Danish law is also the basis of modern Danish law. The idea that “punishment is based on crime prevention” has great progress in Europe at the time. The progressive nature of Danish law is also reflected in the law of inheritance，Peder Lassen’s proposal made the Danish law ahead of the European countries in terms of inheritance regulations. And the legislative spirit of Danish law is also used in modern Danish law.