This invention relates to the fields of
blockchain and privacy computing technology, and provides a
blockchain-based
federated learning method, an industrial product quality prediction method, and a
system. The federated method includes: deploying an initialized
global model on the
blockchain; clients retrieving the model from the chain, training it locally, and submitting model updates; committee nodes, dynamically elected, scoring the updates based on a
verification dataset, and generating a
consensus score by combining reputation weights and a two-sided
pruning mechanism; qualified updates being aggregated by a
smart contract to generate a new
global model and writing it back to the blockchain; the
smart contract distributing rewards and updating the reputation of the
client and committee members based on the
client's
model quality and the consistency of committee member votes; and the
system entering the next training iteration. This invention effectively solves the problems of centralized dependence, low-quality update interference, and unfair incentives in traditional
federated learning by introducing an incentive mechanism and a dynamic reputation evolution mechanism.