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Salt resistance is an essential functional index for marine packaging paper, coastal storage paper and chemical industrial packaging paper. In coastal high-salt fog environments, marine transportation and salt-containing industrial scenarios, salt ions will adhere to and penetrate ordinary paper fibers, causing fiber hydrolysis, corrosion and structural damage. Long-term salt erosion will lead to paper strength attenuation, surface peeling, discoloration and mildew, greatly reducing packaging protection performance and service life. Ordinary waterproof and moisture-proof treatments cannot resist salt ion penetration and chemical erosion, and salt crystallization inside fibers will expand continuously, resulting in paper cracking and pulverization. For seafood packaging, marine logistics cartons and coastal long-term storage paper, poor salt resistance is the main cause of product failure and economic loss. Shandong Ludao Energy Technology Co., Ltd. launches professional paper salt resistance upgrading solutions. By building dense salt isolation protective layer on fiber surface and inhibiting salt ion crystallization and erosion reaction, we effectively block the penetration and damage of chloride ions and salt fog. The modified paper maintains stable structural strength, flatness and appearance in high-salt environments, resists salt-induced aging and cracking, adapts to marine transportation and coastal storage scenarios, and fills the market gap of high-salt resistant special packaging paper.