TECHNOLOGY FOCUS - AGRICULTURE - Preferred Method: The method comprises either: (ia) performing the dechlorination of the tobacco waste by crushing the tobacco waste to an appropriate particle size of 0.2-5 cm, adding water (3-100 times the weight of the tobacco waste) and suitable amount of dechlorinating auxiliary agent, uniformly mixing, soaking at 10-100 degrees C for 0.5-72 hours to completely dissolving out the chlorine, and draining, squeezing or centrifugal solid-liquid separating to obtain extract of tobacco waste and dechlorinated tobacco waste, (ib) fermenting the dechlorinated tobacco waste by adjusting the water content of the solid phase tobacco waste obtained in the step (ia) to 35-200%, adding suitable amount of microorganisms source and auxiliary materials, performing high temperature aerobic solid state fermentation for 15-50 days, and obtaining fermentation product of the dechlorinated tobacco waste, and (ic) dry molding the above resulted product to obtain stalk-like, granular, powder or fluffy fibrous material of the dechlorinated tobacco waste organic fertilizer and the artificial peat; or (iia) fermenting the tobacco waste by crushing the tobacco waste to an appropriate particle size of 0.2-5 cm, adjusting the water content to 35-200%, adding suitable amount of microorganisms source and auxiliary materials, uniformly mixing, and performing high temperature aerobic solid state fermentation for 15-50 days to obtain fermented tobacco waste, (iib) dechlorinating the product obtained in the step (iia) by using the process mentioned in the step (ia), where the addition amount of the water is 3-50 times the weight of the fermented product of the tobacco waste, and (iic) dry molding the above resulted product to obtain stalk-like, granular, powder or fluffy fibrous material of the dechlorinated tobacco waste organic fertilizer and the artificial peat; or (iiia) dechlorinating the tobacco waste by using the process mentioned in the step (ia) to obtain extract of tobacco waste and dechlorinated tobacco waste, (iiib) fermenting the dechlorinated tobacco waste by using the process mentioned in the step (ib) to obtain the fermentation product of the dechlorinated tobacco waste, (iiic) secondary dechlorinating the product obtained in the step (iiib) by using the process mentioned in the step (ia), where the addition amount of the water is 3-50 times the weight of the fermented product of the tobacco waste and the soaking time is 0.5-48 hours, and (iiid) dry molding the above resulted product to obtain stalk-like, granular, powder or fluffy fibrous material of the dechlorinated tobacco waste organic fertilizer and the artificial peat. The extract of the tobacco waste obtained after the solid-liquid separation can be recycled, which the recycling process is carried out by precipitation method, adsorption method, ion exchange method, electrodialysis, electrolysis, membrane separation method and/or biological enrichment method. The precipitation method uses a precipitant comprising silver salt, copper salt and/or bismuth salt. The biological enrichment method uses biological film method or microbial cell culture enrichment method. The tobacco waste is waste tobacco stem, waste tobacco leaf, waste tobacco leaf tip and/or waste tobacco straw, preferably waste tobacco stem undergone threshing process.    TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The dechlorinating auxiliary agent is ammonia (ammonium) compounds, alkali metal compounds, surfactants and/or enzyme preparations. The ammonia (ammonium) compounds are ammonia water, ammonium carbonate, diammonium phosphate and/or ammonium phosphate. The alkali metal compounds are sodium hydroxide, potassium hydroxide, calcium hydroxide, magnesium hydroxide, aluminum hydroxide, calcium oxide, magnesium oxide, sodium carbonate, potassium carbonate, calcium carbonate and/or sodium sulfite. The adsorption method uses an adsorbent comprising active carbon, slag, sand, zinc slag, fly ash, magnesium aluminum carbonate hydrotalcite (calcined layered double hydroxide (CLDH)), dihydrate gypsum, anhydrite, cement clinker containing aluminate mineral, silicate, medical stone, montmorillonite, dolomite and/or shale.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The surfactants are foamless or low foaming surfactant. The enzyme preparations are protease, amylase, lipase, pectinase, cellulose and/or xylanase. ACTIVITY - Fertilizer.