The present specification discloses blockchain-based information processing methods, apparatus, and devices. The blockchain-based information processing method includes: obtaining tree-structured data describing target relationships from a blockchain; obtaining service data of a ith-level target in the tree-structured data describing target relationships from the blockchain, where i is a positive integer; and executing a smart contract used for resource allocation, to allocate resources to each ith-level target based on a resource allocation scheme that is in the smart contract and that corresponds to the service data of each of the one or more ith-level targets.