Serious environmental problems which caused the environmental crime make criminal law protection of environment is particularly important. China's criminal law protection of environment has begun from the establishing of new China (1949), and modern environmental criminal law has quickly developed. The 1997 Penal Code defined the environmental criminal law as a separate section, which demonstrated the recognition of the legislator or the public about the status of environmental criminal law. At present, China's criminal law protection of environment management still exists a lot of problems. This paper analyzes the main problems of the criminal law protection of environment in China, including the guidance of ethical values, the system of causation, the case of causality, criminal punishment for environmental crime.