A blockchain-based cross-currency settlement method performed by a blockchain network is disclosed, including: adding a first blockchain asset corresponding to a first off-chain funds of a first currency to a blockchain account of a transit node in the blockchain network, wherein the first settlement node is inside a territory; adding a second blockchain asset corresponding to a second off-chain funds of a second currency to the blockchain account of the transit node in the blockchain network, wherein the second settlement node is outside the territory; in response to receiving the fund exchange transaction, transferring the first blockchain asset from a blockchain account corresponding to the transit node to a blockchain account corresponding to the second settlement node, and transferring the second blockchain asset from the blockchain account corresponding to the transit node to a blockchain account corresponding to the first settlement node to perform cross-currency fund settlement.