Techniques for processing blockchain data are described. A node in a blockchain network receives service data generated by a first service, wherein the service data comprises a data structure having a field a value of which indicates that the first service is associated with a first processing level. The node stores, based on the value of the field, the service data in a first data processing queue selected from a plurality of data processing queues, wherein the first data processing queue corresponds to the first processing level, and each of the plurality of data processing queues corresponds to a different processing level. The node generates a new block that stores the service data read from the first data processing queue, and additional service data read from one or more of the plurality of data processing queues.