NOVELTY - Preparing nanometer cellulose crystal and converting biomass to sugars involves crushing peanut shell raw material to obtain powdered peanut shell solid particles; mild alkali oxidation by hydrogen peroxide solution and sodium hydroxide solution combination process, extracting cellulose from agricultural powder; using ultrasonic pre-processing, uniformly mixing peanut shell cellulose dispersion, peanut shell cellulose solution and buffer solution and cellulose solution, culturing in culture box to obtain nanometer cellulose crystal, filtering, freezing/drying under ultrasonic effect.    USE - For preparing nanometer cellulose crystal for converting biomass to sugars (claimed).    ADVANTAGE - Using the cellulose crystal preparation method, selecting a large amount of waste acid and impurities of inorganic acid, so the process condition is mild, has strong specificity, and the process is green and environment-friendly, and meets the national sustainable development strategy. The peanut shell as raw material can replace high cost cotton, chemical pulp or microcrystalline cellulose as the raw material, and improves the comprehensive utilization value of peanut shell, changes the most products by mistake or waste fuel and causes the resource waste and economic loss and brings economic benefit and social benefit at the same time can improve the environment. At the same time can generate a large amount of sugar solution.    DETAILED DESCRIPTION - Preparing nanometer cellulose crystal and converting biomass to sugars involves using peanut shell synchronous; crushing peanut shell raw material to obtain powdered peanut shell solid particles; mild alkali oxidation by hydrogen peroxide solution and sodium hydroxide solution combination process, extracting cellulose from agricultural powder; using ultrasonic pre-processing, uniformly mixing the peanut shell cellulose dispersion, peanut shell cellulose solution and buffer solution and cellulose solution in a device, culturing in a culture box to obtain nanometer cellulose crystal, filtering, freezing and drying under ultrasonic effect to obtain powder nano cellulose crystal and sugar liquid.