The invention provides a strain capable of producing salt-tolerant neutral cellulase, collected on 29 October, 2016 under CCTCC M2016437 and having a classification name of Streptomyces sp CW. A fermentation medium from agricultural waste is used to produce cellulase, the raw material is simple, and environmental protection is achieved. A culturing method is simple, cellulase with wide applicable range, reasonable price, good salt tolerance, and high activity under neutral conditions can be provided for domestic users through fermenting production; the neutral cellulase produced herein is salt-tolerant, is applicable to feed addition, textiles and environmental treatment, and is advantageous in treating cellulose-bearing high-salinity wastewater since the neutral cellulase has good salt tolerance. A fermentation medium for the strain used herein is low in price, short in fermentation cycle, mild in fermentation culture condition and free of induction during enzyme production, and therefore, the strain is suitable for large-scale fermentation production.