Presented is a method for processing polarised images based on non-uniform circularly polarised light irradiation for turbid underwater imaging environments. First, the difficulties encountered in imaging and processing targets under non-uniform circularly polarised light illumination conditions are analyzed and the characteristics of circularly polarised light as a light source are described. Secondly, an imaging environment is designed to acquire polarised and visible images of underwater targets. A method based on CLAHE and MSRCR is proposed for pre-processing visible light images to substantially eliminate the effect of non-uniform illumination on image sharpness. The method is shown to be able to fuse the polarisation information image and enhance its edge contours, and finally to fuse the polarisation information fused image with the optimised visible light image, taking into account the visual characteristics of human eyes. The results show that the method achieves the enhancement of the edge contours and textures of the polarised images, and significantly improves the quality of the underwater images.