NOVELTY - Mud loach fingerling bait material is prepared by building red worm cultivation pool, evenly spreading sludge containing red worm seed at bottom of cultivation pool with addition amount of 0.4-0.8 kg/m3 until red worm penetrates sludge and waste residue, returning water, applying cultivating feed 2 days after introducing red worm with addition amount of 110-150 kg/acre and once every 4-6 days with addition amount of 70-100 kg, beating pool by draining water, agitating culture medium with T-type wooden rake, and removing moss and weed, and drying field by draining stagnant water and sunning.    USE - Preparation of mud loach fingerling bait material (claimed).    ADVANTAGE - Mud loach fingerling bait material is low-cost, has high protein content and improved yield, and saves water and grain.    DETAILED DESCRIPTION - Mud loach fingerling bait material is prepared by building red worm cultivation pool, evenly spreading sludge containing red worm seed at bottom of cultivation pool with addition amount of 0.4-0.8 kg/m3 until red worm penetrates sludge and waste residue, returning water, applying cultivating feed 2 days after introducing red worm with addition amount of 110-150 kg/acre and once every 4-6 days with addition amount of 70-100 kg, beating pool by draining water, agitating culture medium with T-type wooden rake, and removing moss and weed, drying field by draining stagnant water and sunning for 3-4 days when temperature is high and sunning for 6-10 days when temperature is low, controlling cultivation pool depth at 3-5 cm and pH at 5.5-8.5, harvesting 30 days after introducing red worm by stopping or reducing water flow during night to obtain hypoxic cultivation pool, bunching worms in water with T-type wooden rake, scooping small red worms using 40 mesh polyethylene mesh net, and placing in holding tank, separating red worms from mud by removing integrated red worm groups from water surface by hand 5-6 times every 1 hour, placing in holding tank, turning 2-3 times a day, removing bottom layer deposited dirt and dead red worms, placing clean red worms in shallow water container with water level of 10-20 cm, changing water 3-4 times a day, aerating using flowing water or dripping water method, washing red worms 2-3 times a day, transporting by loading 5-10 cm thick red worms in container and transporting for less than or equal to 3 hours or by placing less than or equal to 10 kg red worm in oxygenating bag, and exporting by placing in container with ratio red worm:water of 3:1 while constantly oxygenating in which cultivating feed comprises 150-200 pts. wt. fermented manure, 10-16 pts. wt. lobworm powder, 10-15 pts. wt. soybean polypeptide, 3-4 pts. wt. pearl, 0.4-1 pt. wt. walnut oil, 4-7 pts. wt. bean sprout, 30-43 pts. wt. rice bran, and 1-2 pts. wt. honey and is prepared by mixing pearl with bean sprout, grinding, mixing with lobworm powder, adding honey, heating to boiling, stirring to room temperature, and mixing with remaining raw material.