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Low-temperature toughness is an essential guarantee for paper quality stability in winter transportation, cold storage and alpine region application. Ordinary paper is prone to fiber embrittlement under low-temperature environments. The internal fiber cross-linking structure becomes rigid and loses flexible buffer performance, resulting in sharp decline in folding resistance, impact resistance and tensile toughness. Low-temperature brittle paper is easy to crack, break and chip during die-cutting, folding and transportation vibration, causing massive finished product loss. Conventional softening and toughening technologies only adapt to normal temperature environments and cannot maintain flexible fiber structure under low-temperature conditions. Most temperature-resistant treatments only prevent freezing deformation but cannot solve the core problem of low-temperature fiber embrittlement. Shandong Ludao Energy Technology Co., Ltd. develops dedicated low-temperature toughness upgrading solutions. By building low-temperature resistant flexible fiber network and maintaining molecular activity under cold conditions, the paper retains excellent toughness and impact resistance in low-temperature environments. The solution avoids low-temperature brittle cracking and processing breakage defects, stabilizes winter production and cold chain transportation quality, and adapts to alpine region paper application standards.