The mental health law of the PRC,which have been implemented On May 1,2013,protects the rights of patients with mental disorders. But the legal responsibility for instigating mental disorders to do harmful behavior is involved in a few. Through the interpretation of the relevant laws and regulations,and based on the existing definition of the legal responsibility for abetting the commission of crimes,the authors tried to clear the legal responsibility for instigating mental disorders to do harmful behavior,which could protect the rights of patients with mental disorders better and improve the construction of our country legal system.