Unsupervised Waste Classification By Dual-Encoder Contrastive Learning and Multi-Clustering Voting (DECMCV)Constructed a bias-free and cost-effective unsupervised waste classification method called DECMCV.Utilizes a pre-trained ConvNeXt model for image encoding and VisionTransformer for generating positive samples.DECMCV achieves high accuracies on TrashNet and Huawei Cloud datasets, improving classification accuracy by 29.85% compared to supervised models.