In view of the poor efficiency of existing pedestrian detection algorithms based on single-spectral images in all-weather environments,a pedestrian detection algorithm based on progressive multispectral images was proposed.A differential position attention enhancement module was designed,which was embedded in the dual-stream CSP-Darknet53 feature backbone extrac-tion network at different levels,to incrementally enhance global complementary information between different spectra.The cross-modal complementary information fusion strategies were used to improve existing fusion methods,global features were used to guide multi-scale feature fusion for more robust pedestrian detection.Experimental results show that the mAP50 value on the LLVIP dataset is 97.2%,and the mAP50 value on the FLIR dataset is 84.6%,indicating good detection performance.