Method and device for implementing data portability based on block chain technology

The invention provides a data portability implementation method and device based on a block chain technology, and the method comprises the steps: enabling a data receiver to initiate a data matching request to an alliance chain when the data receiver receives transaction information transmitted by a data main body; wherein the alliance chain is also used for receiving a data matching request of a data receiver and sending transaction information matched with the data matching request to the data receiver; the data receiver receives the transaction information matched from the alliance chain and corresponding to the data main body; and when the transaction information sent by the data main body is consistent with the transaction information matched from the alliance chain, the data receiving party stores the transaction information into a local system of the data receiving party. Due to the admission mechanism of the alliance chain, the transaction is ensured to be published by an authenticated mechanism, and