The effectiveness of civil acts violating law has been studied comprehensively in foreign countries,but it has not get enough attention in our country yet.

As a form of legal regulation,regulation of civil act provides an important legal way for realizing the party autonomy and the full development of market economy.

On one hand,the General Principles of the Civil Law of the PRC generally provides the requirements of valid civil acts; in the other hand,it indicates that the legislative paradigm contains severe logic defects in invalidating,altering and rescinding civil acts.

Second, Ortaq as civil act was regard as modern trust.

The efficacy of civil action whose content is Illegal is a great dispute in the civil law research.

Civil action(contract)whose content is illegal is absolutely invalid in our present legal provisions.

For civil actions whose content is illegal,it is necessary for the law to deal differently with different cases: those actions that breach the effective provision are certainly invalid,but those that breach the ineffective provision or agree with the exception provision are not necessarily invalid.

The obvious missing of impartiality refers to the situation that in the carrying out of certain civil behavior,the agent of one party takes use of its own advantages or of the lack of experiences in the other party,causing obvious unbalance in the rights and obligations by two parties,seriously violating impartial and equivalence onerous principles.

This paper will address the following questions: the definition of the legal action, the differences between factual action and the other related actions, the characters and kinds of factual action from a theoretical perspective.