Data synchronization method and device, electronic equipment and readable storage medium

The invention provides a data synchronization method and device, electronic equipment and a readable storage medium, and relates to the technical field of block chains. The method comprises the following steps: a first device receives a data query request from a second device, wherein the data query request is used for requesting to query transaction data of a plurality of block chain nodes; the first device obtains a plurality of target structural bodies based on the data query request, and each structural body in the plurality of target structural bodies comprises a business type of transaction data, creation time of the transaction data, update time of the transaction data and a version number of the transaction data; and the first device sends a data query response to the second device, the data query response comprising transaction data corresponding to the plurality of target structural bodies, so that the second device synchronizes the transaction data corresponding to the plurality of target structura