Li Huailiang’s case basically covers three main issues related to the application of the principle of presumption of innocence in China’s criminal judicial practice: First, the interference of media trial dominated by the idea of presumption of guilt to judicial justice; second, the suspect and defendant are presumed guilty in the criminal proceedings; third, the principle of “In dubio pro reo” only stays in the trial stage of the court. For the issue of media trial, it is necessary to regulate the news reports related to law, authorize the judicial organs to restrict the news reporting cases through legislation, and endow the courts with the power to regulate the news reporting activities related to their trial cases. For the problem of extended detention, China’s judicial organs have carried out activities to supervise and inspect extended detention cases for many times. Media trial and extended detention all reflect the far-reaching impact of the idea of presumption of guilt on China’s public concept and judicial practice, as well as the practical problem that it is difficult to implement the principle of “In dubio pro reo” in judicial practice. The reason is inseparable from the thought of suspected crime in Chinese traditional legal culture, the limitations of China’s reference to the criminal legal system of western countries, and the tradition of China’s administrative intervention in justice.