Quantum machine leaming is an emerging interdisciplinary field that explores the interplay between machine leaming and quantum physics,holding the potential to revolutionize a number of aspects of artificial intelligence [1].Meanwhile,blind quantum computing (BQC) protocols,which are pro-posed for private quantum computation,promise to handle delegated computing tasks without revealing clients' private data [2].The combination of quantum machine learning and blind quantum computing may shed light on multiparty federated learning tasks.