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Surface coating receptivity determines finished quality of coated paper, color printing paper and functional coated paper. Poor paper receptivity means uneven coating adsorption, local coating accumulation, coating shrinkage and peeling during surface coating processing. Base paper with dense closed pores will reject coating liquid penetration, leading to poor coating adhesion; overly loose base paper absorbs coating excessively, causing paper deformation, reduced stiffness and extended drying time. Unqualified receptivity increases coating dosage, raises coating processing cost, causes coating surface granular texture, and downgrades finished coated paper grade. It is difficult for ordinary base paper to match high-speed precision coating production lines due to unstable receptivity. Shandong Ludao Energy Technology Co., Ltd. realizes precise optimization of paper coating receptivity. By adjusting surface opening pore rate, activating surface fiber activity, and improving micro liquid adsorption capacity, the base paper achieves uniform, moderate and fast coating absorption. It enhances bonding fastness between coating layer and base paper, saves coating raw material consumption, obtains smooth compact coating surface, adapts water-based and solvent-based high-speed coating processes, and improves finished coated paper gloss and coating durability.