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Pulp sterilization efficiency is the core guarantee for pulp biological cleanliness and long-term storage stability. In the process of pulp preparation, circulation and standby storage, a large number of bacteria, spores and residual microbial metabolites will breed rapidly, especially in high-temperature and humid production environments. Insufficient sterilization efficiency leads to residual microorganisms in pulp, which continue to reproduce and produce viscous slime, acidic metabolites and impurity flocs. These microbial impurities cause paper pinholes, dark spots, strength weak layers and odor defects, and seriously pollute the white water circulation system. Traditional single biocides have slow sterilization speed, poor spore killing ability, and are prone to microbial drug resistance after long-term use. Excessive use of chemical bactericides will damage fiber activity, affect paper physical performance and cause water system environmental pollution. Shandong Ludao Energy Technology Co., Ltd. develops high-efficiency and environmentally friendly pulp sterilization optimization solutions. By adopting composite targeted sterilization technology, we quickly eliminate bacteria, spores and harmful microorganisms in pulp, inhibit microbial regeneration and metabolite accumulation. The solution is mild and non-damaging to fibers, improves pulp biological cleanliness, eliminates microbial-induced paper defects, prolongs pulp standby storage time, and realizes clean and environmentally friendly papermaking production.