This specification discloses a consensus method of a consortium blockchain and a consortium blockchain system. The method includes: dividing, by a primary consensus node of the consortium blockchain, proposed data into data blocks corresponding to backup consensus nodes of the consortium blockchain based on erasure coding (EC), the data blocks corresponding to hash values calculated based on EC; sending, by the primary consensus node, a first data block to a corresponding backup consensus node, wherein the first data block is forwarded by the corresponding backup consensus node receiving the first data block to one or more other backup consensus nodes; and initiating, by the primary consensus node, a consensus process for the proposed data based on a Practical Byzantine Fault Tolerance (PBFT) protocol to send a hash value of the first data block to the corresponding backup consensus node via a PBFT protocol message.