Recently, active learning had been applied in sentiment classification<cite> (Dasgupta and Ng, 2009)</cite> . Inspired by the study of semi-supervised learning, active learning and deep architecture, this paper proposes a novel semi-supervised polarity classification algorithm called Active Deep Networks (ADN) that is based on a representative deep learning algorithm Deep Belief Networks (DBN) (Hinton, et al., 2006) and active learning (Tong and Koller, 2002) .