competitive theory and received widely response and approval in the study on contentious politics in China. This paper shows that“Rightful resistance”is more struggle justification than struggle strategy.As performance and tactics of contentious,the concept of“rightful resistance” has an inner conflict, because it not only may be non-violence，but also violent，it not only may be legal，but also between legal and illegal，not necessarily true legitimate. This strategic struggle fall in between legal and illegal boundaries is hard to say that it is the truly rightful resistance.As legitimate justification of contentious,the concept of“rightful resistance”is very appropriate to highlight the current national laws，policies and ideologies gives the legitimacy of public process，and show the contrast in the actual operation and implementation. For these"law",no matter whether the trust or not,all protester stake it as a justification of the struggle. Because the concept of rights as a universal value and ethical demand is to be self-evident in the western society，western social movement theory neglect the legitimate justification of contentious have a rightful reason. In today's China，however, when people need make great efforts to justification them contentious action in social context，our theoretical research no reason not to focus on the deeper problems that include ethical and moral element.