Under the traditional centralized paradigm, the storage and management of contracts in centralized databases can easily cause conflicts of interest between enterprises, thereby hindering the collaborative operation of enterprises in the supply chain (SC). Based on this, how to effectively protect the data security within the enterprise has become one of the issues that need to be solved urgently. The decentralization concept of blockchain and smart contracts, as well as the characteristics of distributed data storage mechanism and data cannot be tampered with, provide a feasible way to ensure the security of data. Under this circumstance, how to effectively integrate smart contracts with the SC and build a collaborative platform that can meet the needs of all parties has become an urgent problem to be solved. This article explores the collaboration mechanism between various node enterprises in the SC, uses blockchain technology and smart contract technology to achieve efficient collaboration, and builds a SC collaboration model based on blockchain smart contracts to analyze sellers and supplier value model composition. After simulation analysis, this article concludes: after the introduction of blockchain technology, as the reliability of products increases, the profits of processing companies and sellers will increase accordingly. After comparative analysis, the impact of the smart contract model on the SC was further verified, including but not limited to product quality and price. These research results play a vital role in actual SC management and operations, providing important guidance and inspiration.