In many machine learning problems,a large amount of data is available but only a few of them can be labeled easily.This provides a research branch to effectively combine unlabeled and labeled data to infer the labels of unlabeled ones,that is,to develop transductive learning.In this article,based on Pattern classification via single sphere(SSPC),which seeks a hypersphere to separate data with the maximum separation ratio,a progressive transductive pattern classification method via single sphere(PTSSPC)is proposed to construct the classifier using both the labeled and unlabeled data.PTSSPC utilize the additional information of the unlabeled samples and obtain better classification performance than SSPC when insufficient labeled data information is available.Experiment results show the algorithm can yields better performance. In many machine learning problems, a large amount of data is available but only a few of them can be labeled easily. This provides a research branch to effectively combine unlabeled and labeled data to infer the labels of unlabeled ones, that is, to develop transductive learning. This article, based on Pattern classification via single sphere (SSPC), which seeks a hypersphere to separate data with the maximum separation ratio, a progressive transductive pattern classification method via single sphere (PTSSPC) is proposed to construct the classifier using both the labeled and unlabeled data. PTSSPC utilize the additional information of the unlabeled samples and obtain better classification performance than SSPC when insufficient labeled data information is available. Experimental results show the algorithm can yield better performance.