Decentralized AI training and trading platform and method

The invention belongs to the technical field of artificial intelligence, and discloses a decentralized AI training and transaction platform and method based on a block chain and federated learning, and the platform comprises an AI training layer which is used for an edge device/terminal to permit latest global model parameters from a block chain side and independently execute a training task of federated learning by using local data, the trained local model parameters are submitted to a block chain layer, and training nodes can join in federated learning training after being subjected to identity verification by a certificate authority; according to the block chain layer, federal learning training nodes acquire a new comprehensive global model from a block chain, and training is started by using local data; after training is finished, the federal learning training node submits local models to the block chain, the intelligent contract monitors the number of the local models uploaded to the block chain in real