This paper first reviews the development of study on safety managemement of agricultural products supply chain based on internet of things from home and abroad,then analyzes the main problems and causes in safety supervision of agricultural products supply chain,for example,disperstiveness of agricultural products production and sales hide some dangers for safety supervision of agricultural products supply chain; differences between quality standard and evaluation system of every link of agricultural products production and sales have made it difficult to supervise food safety and attaching importance to market supply and demand information and neglecting quality safety information in agricultural products supply chain have caused the inadequacy of supervision.This paper also discusses the feasibility and difficult points of safety supervision in agricultural products supply chain and constructs the basic framework of such supervision system based on technology of internet of things.Finally,this paper proposes four countermeasures on how to perfect this system.First,strengthening the investment in technology of internet of things and improving the modernization of safety supervision in agricultural products; secondly,strengthening the construction of information platform of each link of agricultural products supply chain and promoting the sharing of quality safety information of agricultural products ; thirdly,intensifying construction of quality safety system and mechanism of agricultural products so as to form all-round quality safety supervision mechanism; finally,quickening the construction of internet of things of agricultural products relating to their quality safety as well as the demonstration and popularization of such supervision models.