Abstract: Aiming at the problems such as insufficient business information sharing and information asymmetry in the current power material supply chain， which cause complicated information flow scenarios， low efficiency and high supply costs， this paper constructs a power material supply chain sharing cloud warehouse based on blockchain technology. In the process of building a supply chain shared cloud warehouse， this article puts forward an idea of supply chain information sharing system， constructs an enterprise supply chain architecture， and realizes the sharing and circulation of equipment demand information of Internet power enterprises among multiple entities and multiple links. At the same time， in view of the high redundancy of blockchain storage， when building the supply chain information sharing system， a recording method of multi-source data information blocks inside and outside the supply chain is proposed to achieve the safe storage of data information， and a hierarchical access authority mechanism is built for each subject. Role-based access control is used to allocate the access authority of each enterprise to solve the problem of low transparency of access authority among supply chain subjects. Aiming at the problem that highly concurrent transaction uplink requests affect the blockchain networking performance， we monitor the throughput of the material sharing cloud warehouse blockchain nodes， propose a flow control algorithm， maximize the resource utilization of the underlying nodes of the blockchain， design an information smart contract， establish a supply chain information sharing system， and improve the reliability of the shared cloud warehouse. The experiment shows that the system has stable fault tolerance mechanism and performance， transparent sharing of business information， and high efficiency and reliability of sharing cloud warehouse when facing large-scale business volume.

Key words: Key words: share cloud warehouse, power material sharing, supply chain, intelligent contract