Forensic medical workers are faced with unique ethical challenges in their attempt to deliver medical care in a custodial environment. We first figure out the reasons why the doctor is standing opposed to the patient through questionnaire and interview of the prison doctor in Shanghai, China, which t to be a bilateral issue. Both sides should take more active approaches and put themselves to the right position to contribute to a better medical environment in the prison hospital, which can reduce medical tangles and help the criminals to accomplish their reform process.