Cooperative principle can make communicative activities go smoothly, but in violation of the cooperative principle may produce conversational implication. First, it analyzes the phenomenon of violation and complying of the cooperative principle in the characters of “Peach Sister” by eight scenes. Then, politeness principle, as addition to the cooperative principle, was analyzed in its character conversation by another six scenarios. The topic of deep close relationship between the primary and the secondary in Peach Sister was effectively reflected in its character implication.