The invention relates to the technical field of block chains, and discloses a transaction monitoring method and a related device, which are used for improving the transaction efficiency and reducing the
transaction security risk, and the method comprises the steps: after a main node in an alliance chain obtains the transaction information of a target transaction, carrying out the
transaction processing of the transaction information, and obtaining a transaction result, the method comprises the following steps that: firstly, a node identifier of a node, transaction information and a transaction result are associated and recorded in a log file, and then, a main node broadcasts the transaction information and the transaction result to other nodes in a block chain for transaction
verification, and respectively receives transaction
verification results returned by the other nodes; the method comprises the following steps: acquiring the node identification of each other node, recording the other node identification of each other node and the corresponding transaction
verification result in a log file in an associated manner, and finally, sending the log file to a
server, so that the
server analyzes the transaction condition of the target transaction based on the node identification, the transaction information, the transaction result, each other node identification and the corresponding transaction verification result.