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Transverse and longitudinal drying uniformity is the key to controlling paper dimensional stability and flatness. In actual production, uneven heat distribution of drying cylinders, unreasonable hot air circulation and inconsistent wet paper moisture will lead to differential drying of paper webs. Local over-drying produces excessive internal shrinkage stress, causing paper curling, wrinkling and edge warping, while partial under-drying results in loose structure, low stiffness and uneven basis weight. Differential drying is the root cause of most paper deformation defects and batch color difference, which seriously affects high-precision printing and automatic cutting processing. Many factories adjust drying temperature blindly, which easily causes strength attenuation and yellowing while failing to solve uniformity problems. Shandong Ludao Energy Technology Co., Ltd. provides systematic paper drying uniformity optimization solutions. By calibrating drying temperature gradient, optimizing hot air balance circulation and matching adaptive wet paper conditioning auxiliaries, we realize synchronous and uniform drying of the entire paper web. The technology eliminates drying stress difference, balances transverse and longitudinal shrinkage rate, thoroughly solves paper deformation and color deviation caused by uneven drying, and stabilizes flatness and size accuracy of finished paper in all batches.