Block chain transaction method and device and electronic equipment

The invention relates to the technical field of block chains, and provides a block chain transaction method and apparatus, and an electronic device. The method comprises the following steps: receiving a consensus domain application sent by a user; according to the account balance information of the user, selecting an outsourcing server of which the guarantee amount is greater than the account balance of the user as a consensus domain of the user, the consensus domain being used for the user to perform block chain transaction; wherein the outsourcing server is determined after the main server verifies a transaction field which is sent by each node cluster and is used for applying for the outsourcing server. According to the embodiment of the invention, a plurality of outsourcing servers are set in a node cluster application mode, a user transaction processing process is transferred from a main server to the outsourcing servers, a large amount of transaction operations are processed in the plurality of outsourc