Abstract: The effective management of whole process data in iron and steel enterprises guarantees the realization of real-time decision-making. The centralization of the existing whole process data management systems is serious， resulting in weak disaster recovery and security and low efficiency. Using blockchain technology to improve its account mechanism， a scheme of iron and steel whole process data management is designed. Firstly， the business requirements and difficulties of whole process data management are described. Secondly， practical Byzantine fault tolerance(PBFT)consensus mechanism and smart contract technology are adopted to design the structural model of the whole process data management system based on the alliance chain. Thirdly， in view of the disadvantage that traditional blockchain accounts have only one kind of asset， a new account mechanism—multiple asset account is designed， then the corresponding asset conversion algorithm in the account and asset transaction algorithm between accounts are proposed. Finally， the characteristics and efficiency of the system are compared and analyzed. The results show that compared with the traditional centralized system， the system has stronger security， stronger disaster tolerance and higher efficiency.

Key words: iron and steel whole process data management; alliance chain; multiple asset account; asset conversion algorithm in the account; asset transaction algorithm between accounts