Equivalent infringement can balance the interests between two parts.

Study on Environmental Common Tort Civil Liability;

Environmental common tort is a special phenomenon of social interest infringement, the civil liability of which is very different from traditional common tort in constitution factors, cause-result relationship and liability principles.

It discriminates from joint tort and joint dangerous act.

Because of the vagueness of legal provision,complexity of the conclusion and different understanding of different people,the joint tort and joint offense are very different in value,purpose,essence,constitution and legal liability.

Joint tort and joint offense are the different systems in tort law and criminal law.

First research commonness in joint infringement;

Personal injuries at sea as a result of collision of ships are generally attributed to a typical joint infringement.

The writer of this article holds that it is of both theoretical and practical significance to explore the relationship between infringement by several individuals and joint infringement.