Camouflaged object detection (COD) aims to segment objects assimilating into their surroundings. The key challenge for COD is that there are existing high intrinsic similarities between the target object and the background. To solve this challenging problem, we propose the Cascaded Decamouflage Module to progressively improve the prediction map, where each decamouflage module is composed of the region enhancement block and the reverse attention mining block to accurately detect the camouflaged object and obtain complete target objects. In addition, we introduce the classification-based label reweighting to produce the gated label maps as the supervision for assisting the network to capture the most conspicuous region of a camouflaged object and obtain the target object entirely. Extensive experiments on three challenging datasets demonstrate that the proposed model outperforms state-of-the-art methods under different evaluation metrics.