This standard provides reference and guideline for the blockchain-based electronic contract platform, this standard describes the technical reference framework, basic functional requirements, and technical indicators of blockchain-based electronic contract platform. This standard serves as a guide for blockchain service providers to integrate blockchain into traditional electronic contract platform, to develop and design tamper proof, full-process traceable blockchain- based electronic contract platform, and to support contract tracking and audit by regulators. This standard provides selection principles and reference basis for enterprises interested in Blockchain-based Electronic Contracts (BEC) services.