Multi-chain type block chain information storage method based on alliance chain

The invention discloses a multi-chain block chain information storage method based on an alliance chain, and the method comprises the steps: initializing a data storage system, and deploying a smart contract; according to the method, a user block chain and a plurality of independent data block chains are constructed, the user block chain is used for storing public information subjected to desensitization processing, each data block chain is used for storing different types of encrypted digital assets, and by separating block chain application functions and privacy data, the user block chain is used for storing the public information subjected to desensitization processing; different types of digital assets are isolated and stored in different data block chains, and the problem that diversified digital asset transaction verification is difficult is solved; and the user uploads the data, and the data is stored and updated. According to the method, the storage security and capacity problems of the data in the bl