NOVELTY - A liquid pectin crude extract is produced by adding 2-3 times clean water in fresh agriculture and forestry waste containing pectin or adding 10-15 times clean water in dry raw material of the above waste, uniformly mixing and crushing agriculture and forestry waste, and filtering through filter screen of 60 meshes to obtain pulp; and dripping 1%citric acid solution (0.5-1.5% of pulp) at 60-90 degrees C, agitating while dripping solution until pH value is 2-3, keeping temperature for 2-3 hours, extracting to obtain pectin, filtering pectin through medical gauze to obtain desired crude extract.    USE - Method for production of liquid pectin crude extract for preparing solid fuel ethanol (claimed).    ADVANTAGE - The method does not only simplify pectin extraction technique, but also increases application manner of such agriculture and forestry wastes as orange peel, thus improving economic value. The crude extract of pectin is directly added with alcohol to be stored for long time at normal temperature. There is no need to eliminate alcohol, thus avoiding alcohol loss during pectin production process and energy consumption for removing alcohol.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for:    (1) preservation of the crude extract which comprises adding industrial alcohol in crude extract until mass concentration of industrial alcohol is 30-60% to prepare crude extract of liquid pectin containing alcohol; and adding 1% citric acid solution (0.5-1.5% of crude extract) to adjust pH value to 1-3.5, uniformly agitating, cooling at room temperature, and hermetically preserving crude extract of liquid pectin;    (2) a solid fuel ethanol which comprises (wt.%): ethanol (75-85), stearic acid (3-5), magnesium chloride (0.01-0.05), pectin crude extract (0.1-0.5) and water (balance); and    (3) preparation method of the solid fuel ethanol.    The preparation method of solid fuel ethanol comprises (A) preheating crude extract of liquid pectin containing alcohol and dispersing pre-gel, weighing 0.1-0.5% of crude extract of liquid pectin containing alcohol, heating to 65-75 degrees C through water bath and fully mixing; (B) preparing magnesium chloride ethanol solution; (C) preparing stearic acid solution; (D) reacting; and (E) cooling, solidifying and packaging. The step (B) includes weighing 85-95% industrial alcohol (1-2 times or 2-3 times by weight of crude extract of liquid pectin containing alcohol), heating industrial alcohol to 65-75 degrees C through water bath, dissolving 0.01-0.05% of magnesium chloride in the industrial alcohol and uniformly mixing. The step (C) includes weighing 85-95% industrial alcohol (1-2 times or 2-3 times by weight of crude extract of liquid pectin containing alcohol), heating industrial alcohol to 65-75 degrees C through water bath, dissolving 3-5% of stearic acid in the industrial alcohol and uniformly mixing. The step (D) includes continuously mixing stearic acid solution at 65-75 degrees C, injecting magnesium chloride solution at 65-75 degrees C in the stearic acid solution, agitating while adding, injecting crude extract of liquid pectin containing alcohol in the mixed solution, and continuously agitating to react for 5 minutes. The step (E) includes injecting mixed solution in mold, cooling, curing, forming and packaging product at normal temperature.