A method for chaining service data, comprising the following: obtaining, by a blockchain node in a blockchain, service data to be chained that is generated for each service processing node for a target service, wherein the service data to be chained comprises feature values corresponding to a plurality of service data fields; invoking, by the blockchain node, a smart contract deployed in the blockchain to generate, based on the feature values corresponding to the plurality of service data fields and at least one predetermined digest information field, service data digest information corresponding to each service processing node, wherein the at least one predetermined digest information field comprises at least one specified data field in a unified digest data structure in plaintext form built for a plurality of service processing nodes; storing, by the blockchain node, the service data digest information and the service data to be chained in the blockchain; receiving, by the blockchain node, a data query request from a service data query terminal, and the data query request comprises a service processing order identifier of the target service; obtaining, by the blockchain node, the service data digest information and the chained service data of the plurality of service processing nodes corresponding to the service processing order identifier from the blockchain; and sending, by the blockchain node, the service data digest information and the chained service data to the service data query terminal, so that the service data query terminal displays the service data digest information based on the unified digest data structure. obtaining, by a blockchain node in a blockchain, service data to be chained that is generated for each service processing node for a target service, wherein the service data to be chained comprises feature values corresponding to a plurality of service data fields; invoking, by the blockchain node, a smart contract deployed in the blockchain to generate, based on the feature values corresponding to the plurality of service data fields and at least one predetermined digest information field, service data digest information corresponding to each service processing node, wherein the at least one predetermined digest information field comprises at least one specified data field in a unified digest data structure in plaintext form built for a plurality of service processing nodes; storing, by the blockchain node, the service data digest information and the service data to be chained in the blockchain; receiving, by the blockchain node, a data query request from a service data query terminal, and the data query request comprises a service processing order identifier of the target service; obtaining, by the blockchain node, the service data digest information and the chained service data of the plurality of service processing nodes corresponding to the service processing order identifier from the blockchain; and sending, by the blockchain node, the service data digest information and the chained service data to the service data query terminal, so that the service data query terminal displays the service data digest information based on the unified digest data structure.