应用物联网技术The opacity of the supply chain process has seriously hindered the development of agriculture,andblockchain and Internet of Things have provided solutions for this. According to the investmentandnon-investment of blockchain, Internet of Thingsandother technologies in the "company + farmer" contract farming supply chain, Stackelberg game models composed in the traditional modelandthe "blockchain + " model was constructed to consist the companyandfarmer respectively. A comparative analysis method was used to analyze the impact of the "blockchain+" model on the productionandmanagement decisionsandprofits of companyandfarmer. The research results show that the existing market size has the greatest impact on the choice of farmers； the company＇s decision mainly considers the construction costs of blockchainandInternet of Things. The results of numerical analysis show that when the construction cost is small enoughandthe market size is small, the company and the farmer will choose to join the "blockchain + " model； when the construction cost is greater than a certain threshold, regardless of the market size, the companyandthe farmer will both at the same time, selectthe "Blockchain +" mode to achieve a win-win situation. Key words: Blockchai
