In different constitutional review systems, the modalities of unconstitutional decision can be classified into three types: unconstitutional and void decision, mere declaration of unconstitutionality decision, and admonitory decision.

This article claims that the constitutional review procedure should be initiated by granting citizens right of petition in the case of violation of constitution, so as to defend the unity of l.

Generally,violation of the constitution often means that the behaviors or the regulations violate the constitution.

The constitutive requirements of violation of the constitution is the norm of confirmation of violation of the constitution,which possess the basic theoretical value to constitution liability system,constitution remedy system and constitution practce.

There are many problems of violation of the constitution in The regulations of relocating urban housing, which are enforced by government department.

The constitution is more such, if there is some unconstitutional phenomenon without any good methods to solve it would be the biggest breakage to the authority of constitution.

However,the NPC Standing Committee as legislator of Criminal Law amendment,which the action of changing Criminal Code by means of criminal law amendment could lead to suspicion of unconstitutional.