Block chain system-based customs declaration data processing method and consensus node

The invention discloses a customs declaration data processing method based on a block chain system and a consensus node, the block chain system comprises a plurality of enterprise nodes responsible for submitting customs declaration data and a plurality of function nodes responsible for approving the customs declaration data, and a target data channel comprising the plurality of enterprise nodes and the plurality of function nodes is established. The plurality of function nodes belong to consensus nodes and comprise a first function node responsible for examining and approving customs declaration data of a target category, and the target data channel has a channel account book. A first enterprise node of the plurality of enterprise nodes may send a first transaction including first customs declaration data of a target category to a first consensus node within a target data channel, such that the first transaction is stored in the channel ledger. After the first function node performs approval processing on th