NOVELTY - A multi-enzyme composition comprises multi-enzyme composite and water at weight ratio of 1:50-100. The multi-enzyme composite includes (pts.wt.) laccase (30-35), xylanase (25-35), pectinase (10-20), amylase (0.1-10), lipase (0.3-10), and diatomite (0.3-25). The stabilizing agent includes (%) stabilizing agent A (30), stabilizing agent B (50) and stabilizing agent C (20). The stabilizing agent A comprises calcium ion (Ca2+) and polyvinylpyrrolidone. The stabilizing agent B comprises EDTA and dithiothreitol. The stabilizing agent C comprises polyvinylpyrrolidone and EDTA.    USE - Multi-enzyme composition used in obtaining fiber slurry from agricultural waste (claimed) used in papermaking.    ADVANTAGE - The multi-enzyme composition can obtain fiber slurry without high-temperature high-pressure chemical cooking method in the pulping process, and while preparing fiber slurry, the raw type lignin is greatly kept.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for:    (1) preparation of the multi-enzyme composition, comprising regulating pH value of water to 7.5-9, adding amylase, lipase, tannase and uniformly agitating, then adding stabilizing agent A and uniformly mixing; adding pectinase, xylanase and laccase to the obtained mixture, uniformly agitating, adding 60% coenzyme and the stabilizing agent B, uniformly mixing and stewing for 5-10 minutes; adding 20% coenzyme and diatomite in the mixture and uniformly mixing, stewing for 5-36 hours at 4-6 degrees C, packaging and storing; and 0.5-1 hour before using the multi-enzyme composite preparation, adding the mixture to the rest coenzyme and the stabilizing agent C, and uniformly mixing;    (2) obtaining fiber slurry from agricultural waste using the multi-enzyme composition, comprising adding water to the multi-enzyme composition to dilute to form relief liquid, pre-soaking agricultural waste at room temperature to obtain pre-soaked mixture, where weight ratio of multi-enzyme composition to agricultural waste in the relief liquid is 0.7-1:100, and the content of agricultural waste in the pre-soaked mixture is 25-30 wt.%; regulating pH value of the pre-soaked mixture to 7.5-11, releasing the pre-soaked mixture for greater than or equal to 6 hours at not higher than 65 degrees C to obtain relief mixture; adding fiber softening agent and cationic surfactant in the relief mixture, softening and curing the relief mixture for 30-60 minutes at 60-80 degrees C to obtain softened and cured mixture; and grinding the softened and the cured mixture to obtain the fiber slurry of the agricultural waste; and    (3) a fiber slurry.