NOVELTY - Charcoal, active charcoal, combustible gas and biological oil are produced by grinding crop straw, controlling moisture content, adding wood tar to the straw powder, mixing, forming straw rod via a spiral squeezing machine to obtain carbonized materials, subjecting materials to pyrolysis furnace, and heating to decompose unstable hemicellulose into carbon dioxide, carbon oxide and a little of acetic acid    USE - Method of producing charcoal, active charcoal, combustible gas and biological oil.    ADVANTAGE - The method reduces fixed assets investments, solves stacking and burning problem of straws, and utilizes waste thus reducing production cost.    DETAILED DESCRIPTION - Charcoal, active charcoal, combustible gas and biological oil are produced by:    (A) grinding crop straw into 8-30 mesh sieves, controlling moisture content at 10-15%, adding wood tar to the straw powder, mixing, and forming straw rod via a spiral squeezing machine to obtain carbonized materials;    (B) subjecting materials to pyrolysis furnace controlled at 120-150 degrees C, and heating further at 150-275 degrees C to decompose unstable hemicellulose into carbon dioxide, carbon oxide and a little of acetic acid;    (C) heating further at 275-450 degrees C for 30-40 minutes to obtain acetic acid, methyl alcohol, tar, methane and ethene;    (D) heating further at 450-500 degrees C for 40 minutes, heating at 600-900 degrees C for 30-40 minutes, cooling to 450-500 degrees C for 40 minutes to remove volatile substances, heating at 600-900 degrees C, filling water steam as activating agent when the temperature is 600 degrees C, activating when the water steam is contacted with the materials at 850-900 degrees C for 0.5-1 hour to form straw active charcoal, removing water steam generated by the boiler when the temperature is 850-900 degrees C, and discharging gas containing water steam from the furnace body via a suction blower;    (E) cooling the discharged gas via a cooling water tank while controlling the temperature of the water at below 60 degrees C to separate biological oil, wood tar oil and pyroligneous;    (F) subjecting gas to a gas storage cabinet via a discharging machine, subjecting gas (100 wt.%) to scouring process using an industrial hydrochloric acid is (10-15 wt.%), removing iron and impurities to obtain water-soluble chloride, washing with clear water for 3-6 times until the content of the impurities in the raw material charcoal is lowest, and rinsing when washing pH is 5-6; and    (G) centrifuging, filtering, drying to control moisture content at 5-8%, screening using 24-40 mesh sieves, grinding, and screening using 120-180 mesh sieves.    DESCRIPTION OF DRAWING(S) - The drawing is a flow chart of a method of producing charcoal, active charcoal, combustible gas and biological oil. Drawing includes non-English language text.