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Dimensional stability is a decisive indicator for high-precision printing paper, die-cutting paper and customized specification paper. Paper is extremely sensitive to environmental temperature and humidity changes; uneven moisture absorption and dehumidification will cause transverse and longitudinal shrinkage or expansion, resulting in paper size deviation, sheet deformation and specification inconsistency. Unstable dimensions will lead to inaccurate printing overprinting, die-cutting size error and unqualified finished product specifications, which is the main cause of batch product rejection in high-precision processing. In seasonal alternating environments, dimensional fluctuation is more obvious, bringing great difficulties to factory quality control and fixed-specification delivery. Traditional moisture adjustment methods can only relieve short-term deformation but cannot improve the inherent moisture resistance and dimensional stability of paper fibers. Shandong Ludao Energy Technology Co., Ltd. launches paper dimensional stability upgrading solutions. By optimizing fiber internal structure and adding moisture-resistant stabilizing components, we inhibit abnormal fiber expansion and shrinkage caused by humidity changes, balance transverse and longitudinal dimensional change rate. The treated paper maintains stable size and shape in variable temperature and humidity environments, ensures accurate overprinting and die-cutting processing, unifies batch product specifications, and meets high-standard customized precision processing requirements.