NOVELTY - Organic liquid fertilizer comprises 500-600 pts. wt. fermented raw liquid, 10-15 pts. wt. potassium sulfate, 10-15 pts. wt. magnesium sulfate and 10-15 pts. wt. urea. The fermented raw liquid is prepared by mixing main component, fermentation medium, enzyme composition, bentonite, ammonium sulfate, calcium superphosphate, waste molasses and water, fermenting the mixture for not less than 30 days, and filtering the fermented mixture to obtain fermented raw liquid.    USE - The organic liquid fertilizer is useful for crops.    ADVANTAGE - The fertilizer solves the technical problem of existing fertilizer, causes no pollution to the environment, and is harmless to use and cost-effective. The method is simple to perform, quickly increases soil fertility, improves crop quality and soil, and promotes rapid composting process, and sustainable development of agricultural and ecological environment.    DETAILED DESCRIPTION - Organic liquid fertilizer comprises 500-600 pts. wt. fermented raw liquid, 10-15 pts. wt. potassium sulfate, 10-15 pts. wt. magnesium sulfate and 10-15 pts. wt. urea. The fermented raw liquid is prepared by (a) using 200-300 pts. wt. main component, 100-200 pts. wt. fermentation medium, 1-3 pts. wt. enzyme composition, 50-60 pts. wt. bentonite, 10-25 pts. wt. ammonium sulfate, 10-25 pts. wt. calcium superphosphate, 50-60 pts. wt. waste molasses and 300-600 pts. wt. water, (b) mixing the above-mentioned components, and fermenting the mixture for not less than 30 days, and (c) filtering the fermented mixture to obtain fermented raw liquid, where the main component includes livestock carcasses and the concentration of enzyme composition is 0.05-0.08%. The enzyme composition includes amylase, cellulase and lipase in a mass ratio of 4:3:3. The fermentation medium comprises 2 wt.% fermentation agent, 18 wt.% fish meal, 18 wt.% bone powder, 18 wt.% soybean meal, 18 wt.% rice bran, 10 wt.% rapeseed, 10 wt.% wheat bran, 5 wt.% ammonium persulfate, and 1 wt.% granulated sugar. The fermentation agent comprises Bacillus megaterium, Lactobacillus bulgaricus, L.acidophilus, Saccharomyces cerevisiae and Clostridium in a mass ratio of 2:2:2:2:2. An INDEPENDENT CLAIM is included for method for preparing the organic liquid fertilizer, which involves (a) mixing the main component, fermentation medium, enzyme composition, bentonite, ammonium sulfate, calcium superphosphate, waste molasses and water, uniformly stirring the mixture, performing fermentation for not less than 30 days, filtering the mixture to obtain fermented raw liquid, and (b) adding potassium sulfate, magnesium sulfate and urea to the fermented raw liquid, mixing and uniformly stirring the mixture, fermenting the mixture for 3 days, and filtering the fermented mixture to obtain organic liquid fertilizer, where the main component is prepared by grinding the livestock body with pad material, adding 0.05-0.08% enzyme composition to the main component, forming fermentation layer on the pad material, maintaining the inner temperature of fermentation layer at 45-60 degrees C and water content at 50-60%, stacking and decomposing for 35-90 days, where the pad material comprises rice chaff and fermentation agent, and the fermentation medium is prepared by adding the fermentation agent, fish meal, bone powder, soybean meal, rice bran, rapeseed, wheat bran, ammonium persulfate and granulated sugar to stirrer, maintaining the rotating speed of the stirrer at 23-26 revolutions per minute (rpm) and mixing the components for 5 minutes, stacking the mixture, performing fermentation at 45-60 degrees C, maintaining moisture content at 50-60%, and decomposing the fermented mixture for 45 days to obtain fermentation medium.