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Paper edge curl is the most frequent deformation defect in finished paper storage and usage. Asymmetric moisture evaporation speed, transverse internal stress difference, uneven edge sizing and one-sided drying stress will cause paper four-edge upturned curl and wavy edge deformation. Curled paper cannot be fed normally in automatic printing, copying and laminating equipment, leads to feeding jam, positioning error and cutting size deviation. For roll paper, edge curl will cause edge extrusion damage during rewinding, edge breakage and uneven roll end face, directly downgrading finished roll quality. Most workshops adjust edge moisture artificially to relieve curl, which depends on worker experience, has poor effect sustainability, and easily causes secondary edge softness defect. Edge curl is hard to eradicate only by mechanical drying and tension adjustment. Shandong Ludao Energy Technology Co., Ltd. provides systematic anti-edge-curl solutions. It balances transverse and longitudinal fiber shrinkage rate, synchronizes edge and middle moisture volatilization speed, releases asymmetric internal stress, and strengthens edge structural stability. The technology fundamentally eliminates four-edge upturned and wavy edge deformation, keeps flat sheet shape under different temperature and humidity environment, ensures smooth automatic feeding, reduces edge waste, and stabilizes downstream automated processing efficiency.