The application provides a
hybrid blockchain method,
system, device and medium based on PoW for distinguishing between large and small transactions, comprising setting a traditional
blockchain as a main chain and a DAG type
distributed ledger as a DAG auxiliary chain in the
system, both of which together constitute a
hybrid chain; a preset transaction value threshold; a node selects a main chain
consensus or a DAG auxiliary chain to stabilize, publishes a new block or transaction, and lets all nodes accept and reach a
consensus with it; the preset weight of each transaction is 1, and two parts including epoch sorting and unit sorting are obtained, the strict sorting of epochs and blocks is obtained through epoch sorting, the strict unit sorting of each epoch is obtained by sorting the units in each epoch according to the height, forward cumulative weight and backward cumulative weight of the units, and the full sorting of transactions of the
hybrid blockchain is obtained by integrating the results of unit sorting and epoch sorting; and an efficient and safe
payment platform is provided for
system users.