BIG (Blockchain Insurance Global) insurance chain platform is a customizable and extensible insurance ecosystem based on blockchain, Internet of Things and artificial intelligence. The AURA consensus algorithm with the best balance of fairness and efficiency and the POS+DPOS consensus bimodal model are used as the engine for generating blocks. It is characterized by being neutral to the underlying public chain architecture and can support loosely coupled cross-chain mechanisms based on ParitySubstrate Blockchain, which uses Polkadot technology to achieve cross-chain compatibility, to exchange value with other public chains (including Ethereum, Fabric, BCOS, ChinaLedger and other public chains and alliance chains), so as to facilitate the application layer of insurance functions Construct. The BIG insurance chain platform takes new technology as the core, transforms the traditional insurance process mechanism - digitalizes insurance products, and modularizes insurance business processes - so as to improve efficiency and production capacity, and return value to users and participants of the BIG insurance chain platform .