NOVELTY - A lignocellulosic material full-recycling biological process is performed by removing wood fiber impurities, adding water, crushing into slurry material, adding hydrochloric acid (HCl), performing hydrolysis to obtain hydrolyzed material liquid, adding sodium hydroxide (NaOH), processing to obtain neutralized material liquid at pH of 7, performing membrane desalination process to obtain primary salt and desalinated material, performing membrane separation to primary salt to obtain industrial salt solution, evaporating, and drying crystal into industrial salt or electrolyzing into NaOH and HCl.    USE - Lignocellulosic material full-recycling biological process (claimed).    ADVANTAGE - Process has high resource utilization rate which converts lignocellulose raw material into fuel ethanol, standard gas, organic fertilizer, and dry ice, reduces device investment and production cost, effectively reduces energy consumption and heat and mass transfer running cost, reduces possibility of product inhibition which greatly accelerates fermentation efficiency, and shortens product production period.    DETAILED DESCRIPTION - A lignocellulosic material full-recycling biological process is performed by removing wood fiber impurities, adding water, crushing into slurry material, adding hydrochloric acid (HCl), performing hydrolysis to obtain hydrolyzed material liquid, adding sodium hydroxide (NaOH), processing to obtain neutralized material liquid at pH of 7, performing membrane desalination process to obtain primary salt and desalinated material, performing membrane separation to primary salt to obtain industrial salt solution, evaporating, drying crystal into industrial salt or electrolyzing into NaOH and HCl and returning back in process, film-concentrating desalinated material to 30-36 brix, feeding in alcoholic fermentation tank, adding pre-cultured hypertonic solution of ethanol yeast liquid, performing ethanol hypertonic fermentation to obtain fermentation liquid in which fermentation liquid is processed at start of ethanol fermentation by filtering fermentation liquid through micro-filter device to obtain retentate and permeate, returning retentate in alcoholic fermentation tank, feeding permeate in pervaporation membrane system, extracting ethanol, returning extracted ethanol in ethanol fermentation tank, performing ethanol hypertonic fermentation, and concentrating and dehydrating extracted ethanol to obtain fuel ethanol in which extracted ethanol is not returned in alcoholic fermentation tank when part of liquid extracted ethanol reducing sugar content after feeding in pervaporation membrane system is less than or equal to 1%, performing material 2nd film-concentration to 25-30 brix, directly feeding in anaerobic fermentation tank, pre-inoculating with methane fermentation bacteria mixture, performing methane fermentation to obtain methane gas mixture and aged bacterial sludge, cooling methane gas mixture to obtain carbon dioxide (CO2) and methane gas mixture, performing CO2 gas membrane separation to obtain methane standard gas, collecting part of alcoholic fermentation tank exhaust under vacuum, cooling, feeding gas-liquid mixture in gas molecular film CO2-enriching column, combining with obtained separated CO2, performing pressurized condensate packaging to form dry ice, performing filter pressing dehydration to aged bacterial sludge from regular discharge of ethanol fermentation tank and anaerobic fermentation tank using plate frame filter press, drying, packaging into organic fertilizer product, removing bacterial sludge, and returning liquid in anaerobic fermentation tank to continue fermentation.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of a lignocellulosic material full-recycling biological process. (Drawing includes non-English language text).