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Paper surface cleanliness is a basic appearance indicator that determines the grade and market competitiveness of high-end paper. In the production process, residual tiny dust, floating fibers, sizing spots, filler particles and microbial spots will cause surface cleanliness defects. Unclean paper surface will lead to printing fine dots, pattern impurities, uneven lamination and unqualified food hygiene indicators, which cannot meet the production requirements of high-end gift packaging, precision printing and food-grade paper. Most paper enterprises rely on post-production manual cleaning and dust removal, which increases labor costs, cannot completely remove micro impurities, and easily causes secondary pollution. The root cause of poor paper cleanliness lies in unstable pulp cleanliness and unpurified production environment water system. Shandong Ludao Energy Technology Co., Ltd. provides systematic paper cleanliness upgrading solutions. Starting from pulp purification and water system optimization, we remove residual impurities and pollutants in the production source, inhibit spot generation and dust adhesion, and fundamentally improve paper surface cleanliness. The treated paper has no fine spots, floating dust and impurities on the surface, smooth and clean texture, meets high-end printing and food-grade hygiene standards, effectively reduces post-processing cleaning procedures, and improves product yield and market grade.