This paper firstly evaluates the value of farmland by using the “blockchain + supply chain finance” model and determines the compensation index. Secondly, a cropland value model based on the GM model and Hedonic model is constructed, and the base revenue price and feature adjustment price are calculated. Finally, the dynamic driving factors were analyzed, including the dynamic changes in the amount of arable land and the tripartite game process of farmers, government and developers, and the economic compensation standard for arable land protection based on comprehensive value was proposed. The results show that the average value of the economic compensation standard for arable land protection in city H is 17.83 million/