Overview: In the atmospheric environment, there are many fine particles in the air, which will lead to the absorption or refraction of light and affect the normal radiation of light. In this case, the color, contrast, saturation and detail of the image captured by the camera are often seriously affected. At present, computer vision needs to realize many high-level tasks such as pedestrian recognition, automatic driving, air navigation, remote sensing and telemetry, and these high-level tasks have a high demand for image quality. Therefore, it is of great significance to carry out single image defogging to obtain higher quality images before performing high-level tasks. In recent years, single image defogging using generative adversarial networks(GAN) has become a hot research aspect. However, the traditional GAN algorithms rely on annotated datasets, which is easy to cause over-fitting of ground truth, and usually performs not well on natural images. To solve this problem, this paper designed a GAN network incorporating dark channel prior loss to defogging single image. This prior loss can influence the model prediction results in network training and correct the sparsity and skewness of the dark channel feature map. At the same time, it can definitely improve the actual defogging effect and prevent the model from over-fitting problem. In addition, this paper introduced a new method to obtain dark channel feature map, which compresses pixel values instead of minimum filtering. This method does not need to set fixed scale to extract dark channel feature map, and has good adaptability to images with different resolutions. Moreover, the implementation function of this method is a convex function, which is conducive to embedded network training and enhances the overall robustness of the algorithm. The proposed algorithm is quantitatively analyzed in the comprehensive test set SOTS and the mixed subjective test set HSTS. The peak signal-to-noise ratio (PSNR), structural similarity SSIM and BCEA Metrics are used as the final evaluation indexes. The final result shows that our algorithm can raise PSNR up to 25.35 and raise SSIM up to 0.96 on HSTS test sets. While it comes to SOTS test sets, our method achieves the result of 24.44 PSNR and 0.89 SSIM. When we use BCEA metrics to evaluate our algorithm, we achieve the result of 0.8010 e,1.6672 r and 0.0123 p. In summary, Experimental results show that the proposed algorithm performs well on real images and synthetic test sets compared with other advanced algorithms.Single image defogging using generative adversarial networks (GAN) relies on annotated datasets, which is easy to cause over-fitting of ground truth, and usually performs not well on natural images. To solve this problem, this paper designed a GAN network incorporating dark channel prior loss to defogging single image. This prior loss can influence the model prediction results in network training and correct the sparsity and skewness of the dark channel feature map. At the same time, it can definitely improve the actual defogging effect and prevent the model from over-fitting problem. In addition, in order to solve the problem that the extraction method of traditional dark channel feature has non-convex function and is difficult to be embedded into network training, this paper introduces a new extraction strategy which compresses pixel values instead of minimum filtering. The implementation function of this strategy is a convex function, which is conducive to embedded network training and enhances the overall robustness of the algorithm. Moreover, this strategy does not need to set a fixed scale to extract the dark channel feature map, and has good adaptability to images with different resolutions. Experimental results show that the proposed algorithm performs better on real images and synthetic test-sets like SOTS when compared with other sota algorithms.