In order to resolve the gap in domestic food safety supervising and decline the probability of food accidents, this paper puts forward seamless theory and related information sharing theory to construct information sharing platform for seamless supervising of food safety. Firstly, analyzes the significance of domestic food safety and the current study situation of food information platform. Through the analysis of the responsibilities of food safety supervising department and according to the characteristics of seamless theory and the requirements of information sharing, puts forward the targets and contents of constructing information sharing platform for seamless supervising of food safety, and designed the functional module and service items of information sharing platform for seamless supervising of food safety.