NOVELTY - Preparing organic fertilizer involves mixing 45-55kg animal excrement, 60-70kg straw, 1-2kg lactic acid, 1-1.5kg yeast, 1-1.5kg photosynthetic bacteria and 50-60kg water in a reaction kettle. Reaction kettle comprises pedestal and kettle body (2), where the kettle body is combination of rectangular body (3) and semi cylindrical bottom. Power shaft is connected with kettle body on left and right walls, and power shaft one end is set with external power connection system. Power shaft (15) vertical portion is set with stirring stick, where each stirring stick is fixed on power shaft.    USE - Method for preparing organic fertilizer (claimed).    ADVANTAGE - The method enables to prepare organic fertilizer in quick and short time. The method is simple to operate, and has wide industrial applicability.    DETAILED DESCRIPTION - Preparing organic fertilizer involves mixing 45-55kg animal excrement, 60-70kg straw, 1-2kg lactic acid, 1-1.5kg yeast, 1-1.5kg photosynthetic bacteria and 50-60kg water in a reaction kettle. Reaction kettle comprises pedestal and kettle body, where the kettle body is combination of rectangular body and semi cylindrical bottom. Power shaft is connected with kettle body on left and right walls, and power shaft one end is set with external power connection system. Power shaft vertical portion is set with stirring stick, where each stirring stick is fixed on power shaft at middle part. Adjacent two pieces of stirring stick are staggered and set with mounted blade. Front and rear two side walls of upper part are set with guide part, which is set at interval on each one side wall. Kettle body part is set with kettle cover and an air inlet. Air inlet is connected with external fan by pipeline and outside kettle body equipped with insulating layer. Side bottom of kettle is set with heating layer, upper kettle is set with water inlet pipe and upper bottom is placed with material valve. The mixture is stirred in the reaction kettle at speed of 2-4 revolutions per minute for 6-7 minutes. The mixture is heated at 118-122 degrees C for 1-2 hours, and then subjected to natural stacking for 7-8 days.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of a reaction kettle.    Kettle body (2)    Rectangular body (3)    Kettle cover (11)    Air inlet (13)    Power shaft (15)