In the special period of the outbreak of the COVID?19， the crime of impairing the prevention and control of infectious diseases was reactivated. The amendment of Article 330 of the Criminal Law has its legitimate basis and the urgent need of reality， which is more conducive to regulating the behavior of impeding the control of the COVID?19 and effectively punishing and preventing crimes. From an objective point of view， taking measures to prevent and control Class A infectious diseases can also constitute the crime. From the subjective aspect of the crime， the crime should be defined as intentional crime， which can be inferred from the definition of negligence in the general provisions of the Criminal Law and the description of the crime. The determination of the crime of imparing the prevention and control of infectious diseases can be distinguished from the crime of endangering public security by dangerous means from the four components of the crime. For the punishment of this crime， we should consider that the actually harmful results and specific dangers can be applied to the same statutory punishment， and in the current epidemic situation can be severely punished.