The role of media supervision on food safety is enhanced increasingly. However, media reports on food safety in many cases exist problems of not objectively, not timely, flaws in processing mode and etc.. In order to solve these problems, analyze the reasons there must be generated, the causes of the corresponding problem from the perspective of legal norm, and for these reasons, pointed out that the state should be clear media food safety supervision power in legal norm exists, the establishment of legal accountability mechanism of malicious false reports, legal segregation mechanism of ethics bad media practitioners and the establishment of the food safety administrative supervision organs and between the media legal two-way communication channels etc.. Finally, make media supervision on food safety to get maximize, make greater contribution to the improvement of people's life and health level.