Abstract: In the traditional notarization service, there are problems such as poor information flow, easy data loss and difficult verification after data tampering, which brings inconvenience to judicial evidence collection and other work. Trusted notarial information storage system based on the consortium blockchain is designed. It set notarization to alliance node using Hyperledger components, calculated the Hash abstract of the key data involved in the process of notarization, uploaded them and stored in the consortium blockchain for data query, and supported the fine-grained access control of notarial data by different notarization. In addition, the system realized full life cycle management of notarial data, recorded all users' operations of notarial data on the blockchain, and provided support for the operation supervision of notarial data in the whole process of business circulation. The experimental results and analysis show that the system has reasonable design of functions and good performance.