Information disclosure is an important means of market discipline． However，that disclosure can play the role of market discipline need investors pay attention to banks’risk taking behavior． In China，there exists a partially implicit insurance system． Unde this system，the attetion paid to banks’risk taking behaviors by investors varies with to the support that banks received from the government． We establish a game model to analyze the interaction mechanism between banks’risk-taking behaviors and disclosure under partially implicit insurance． We find that banks which are not surely rescued by government tend to choose the sound risk-taking strategy． Besides，under implicit deposit insurance system，banks tend to take excessive risk and the implicit deposit insurance may weaken the market constraint effect of disclosure． This paper uses empirical analysis to prove the relevant conclusions，and put forwards corresponding policy recommendations．