You can try it according to the following formula: 1. Culture medium preparation 1. Formula corncob crumbs 80%, wheat bran 18%, gypsum powder and sugar each 1%, potassium dihydrogen phosphate 0.3% and water 130%. 2. The preparation method is weighed according to the proportion of the formula, and the mixture is stirred evenly in the mixing site, and the pile is stuffy for 2 hours. After the stirring, the water content is checked to be about 65%, that is, the ingredients are grasped tightly by hand, and water drops are formed between the fingers but do not drip. Then build a pile for fermentation, and turn over the pile 2-3 times in the middle. 2. Bagging sterilization 1. Loading The fermented culture materials are respectively put into bags, and each bag is about 1 kg, with a wet weight of about 2 kg. Tightly packed and compacted, and the mouth of the bag tube is tied tightly with string. 2. Sterilization: Put the packed material bag into a space sterilization bag for sterilization for 4-5 hours, or put it into an atmospheric soil steamer for sterilization for 8- 10 hours, cool it until the material bag is not too hot to touch, take it out and put it in a clean room. 3. Inoculate while the temperature of inoculation bag in constructio n drops below 30℃. After inoculation, the fungus was cultured in a clean room at 15-25℃ in the dark, and the bag was turned over 1 7 days/time. After 50-60 days of culture, hyphae can grow all over the bag. 4. After the bags of mycelium are full, strengthen ventilation to control the temperature of seedbed at 10-22℃ and keep the soil surface moist. After 8- 10 days of culture, the tumor on the mushroom stick gradually differentiated and expanded into mushroom fruiting body. At this time, it is necessary to increase water spraying to increase the relative humidity of air by 85%-95%. When the mushroom cap is extended to 5- 10 cm and the edge of the cap is not fully unfolded, it can be harvested.