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Paper air permeability is a key functional indicator for filter paper, food packaging paper, medical paper and industrial special paper. Unreasonable fiber structure and excessive compactness will lead to poor air permeability, failing to meet the ventilation and filtration requirements of special scenarios. In contrast, excessive air permeability will cause insufficient paper tightness and strength, affecting packaging protection performance. It has always been a difficult technical point for paper enterprises to balance air permeability and physical strength. Blindly adjusting pulping density often leads to performance imbalance and unqualified products. Shandong Ludao Energy Technology Co., Ltd. provides precise air permeability optimization solutions. By scientifically adjusting fiber interweaving gaps and adopting functional permeability regulators, we realize precise control of paper air permeability without damaging paper strength and structural stability. The solution can flexibly match the air permeability standards of different special paper types, meet the production needs of breathable packaging, industrial filtration and medical sanitary paper, and help enterprises expand differentiated special paper product lines and increase added value of products.