Abstract:  Ecological security is an important part of national security, from the perspective of which environmental crimes are controlled through both international and domestic channels. Concerning international cooperation, we should make full use of the International Criminal Police Organization platform through the share of the data of environmental crimes and realize vigorous cooperation in tracing, arresting, and extradition; strive for allround and efficient criminal judicial assistance among different nations and remove the statetostate obstacles in combating international environmental crimes; accelerate the pace of entering statute of the International Criminal Court so as to gain more discourse power. Domestically, we should construct the environmental criminal law system centering on ecological law and realize the independence of the environmental criminal law; adopt the doctrine of severe punishment while giving full play to dualistic function of the crime punishment and environmental recovery and the multiple function of penalty; employ the method of causal relation of epidemic disease and presumptivefault rules to get out of the predicament of the environmental crime judicial cognizance.

Key words:  ecological security, environmental crime, international cooperation, dualistic penalty system, principles of cognizance