NOVELTY - Smoke disinfectant comprises (pts.wt.) disinfecting active ingredient (30-90), incendiary agent (5-20), oxidant (5-20), stabilizer (2-15), and absorbent (2-15). The disinfecting active ingredient is selected from bromochlorohydantoin and/or dibromohydantoin. The incendiary agent is selected from granulated sugar, rosin, sulfur, paraffin wax, sawdust, sodium nitrate, and/or potassium nitrate. The oxidant is selected from potassium chlorate, sodium chlorate, sodium bromate, and/or potassium bromate.    USE - The smoke disinfectant i.e. powder, granule, or preferably capsule is used in preparing sterilizing disinfecting composition for closed environment, wild environment, and family environment. The wild environment is selected from domestic fowl culturing farm, greenhouse tent, tobacco storing container and frames, and/or public places. The sterilizing disinfecting composition is used for sterilizing and disinfecting, removing smell, deodorizing, bleaching, oxidizing, decomposing, and neutralizing gaseous organic substances. It is useful for air and objects in closed environment of epidemic focus; and farms, greenhouse vegetables, inoculating mushrooms, and fumigating seeds. The sterilizing disinfecting composition is used for preventing and treating anthracnose, downy mildew, powdery mildew, rust disease, blight, damping-off, stripe virus disease, and rice blast of fruit trees, cotton, rice, wheat, or vegetables and fruits. (all claimed)    ADVANTAGE - The disinfectant has excellent and broad-spectrum disinfecting and sterilizing activity, high effective smoking rate, excellent safety, humidity resistance, and economic efficiency, and low residue; easily burns; is quick to smoke and environment friendly; efficiently and continuously smokes; and does not spontaneously combust during storage and transportation.    DETAILED DESCRIPTION - Smoke disinfectant comprises (pts.wt.) disinfecting active ingredient (30-90), incendiary agent (5-20), oxidant (5-20), stabilizer (2-15), and absorbent (2-15). The disinfecting active ingredient is selected from bromochlorohydantoin and/or dibromohydantoin. The incendiary agent is selected from granulated sugar, rosin, sulfur, paraffin wax, sawdust, sodium nitrate, and/or potassium nitrate. The oxidant is selected from potassium chlorate, sodium chlorate, sodium bromate, and/or potassium bromate. The stabilizer is selected from sodium bicarbonate, sodium carbonate, potassium bicarbonate, potassium carbonate, sodium sulfate, zinc sulfate, potassium sulfate, sodium bisulfate, potassium bisulfate, or anhydrous sodium sulfate. The absorbent is selected from magnesium oxide, zinc oxide, magnesium sulfate, and/or magnesium chloride. An INDEPENDENT CLAIM is included for preparation of smoke disinfectant comprising uniformly mixing disinfecting active ingredient, incendiary agent, oxidant, stabilizer, and absorbent.