Data processing method and device based on block chain

The embodiment of the invention discloses a data processing method and device based on a block chain. The method comprises the steps that an information verification request sent by a first user is received, and if it is determined that the information verification request is a legal request, the information verification request is sent to consensus nodes in a block chain system, so that the consensus nodes determine a first verification result of an asset association event according to the information verification request. Receiving a first verification result sent by each consensus node, determining a consensus result of the asset association event according to each received first verification result, and when it is determined that the asset association event reaches a consensus, addingan asset association event storage block comprising a first user identity identifier corresponding to the first user and the asset association event to the block chain, and sending information verification confirmation pass i