The invention discloses a blockchain-based digital asset transaction consistency maintenance method, including the following steps: (1), firstly, creating a new transaction by a transaction initiationnode; (2), enabling other nodes in the network to receive transaction information, verifying the legality of the transaction information, and putting the legal transaction into a new block; (3), broadcasting the new block to the network, enabling the nodes in the network to synchronize the new block, and when the nodes synchronize the new block, first updating an MPTC account state tree; (4), updating the MPTC account state tree in step (3), and enabling an account that carries out a new transaction to associate the new transaction with the most recent transaction of the account; and (5), linking transaction records related to the same account together according to the time sequence to ensure that the new block is added to a blockchain, and the account state tree and an account transaction chain are updated. Thereby, the problem of account state consistency in the field of digital assets can be solved.