NOVELTY - Producing organic fertilizer from Jatropha curcas residual oil waste comprises processing the corn stalk by natural air drying and grinding, mixing Jatropha curcas residual oil waste, corn stalk and pig manure, adjusting the moisture content of the mixed material, composting, piling, where each pile is in a conical shape during piling, after initiating the composting, manual turning once in every 4 days, fermenting, cooling the pile to environment temperature, air drying the compost, grinding, and sieving, and obtaining the finished product of the organic fertilizer.    USE - The method is useful for producing organic fertilizer from Jatropha curcas residual oil waste.    ADVANTAGE - The method controls composting fermentation process within 15 days, utilizes organic matter (about 40%, and produces product, which reaches the standard quality requirement of the organic fertilizer, and high germination index (up to more than 88 %).    DETAILED DESCRIPTION - Producing organic fertilizer from Jatropha curcas residual oil waste comprises (i) processing the corn stalk by natural air drying and grinding until the diameter is 0.1-1 cm; (ii) mixing (in wt.%) Jatropha curcas residual oil waste (60-80), corn stalk (10-30) and pig manure (10), where the carbon-nitrogen ratio (C/N) of the mixed material is (21-29): 1; and (iii) adjusting the moisture content of the mixed material in the step (ii) to 60%, performing composting fermentation, where the organic matter composting agent is not added during the composting process, piling, where each pile is in a conical shape during the piling process, the diameter of the bottom surface is from 90-110 cm, the height is from 80-100 cm, after initiating the composting fermentation, manual turning once in every 4 days, where the fermentation is performed at 64-75 degrees C for 11-15 days, and cooling the pile to the environment temperature; and (iv) air drying the compost, grinding, and sieving, and obtaining the finished product of the organic fertilizer.