First, insufficient pre-wetting. Straw should be fully soaked to facilitate fermentation. Incompletely immersed straw needs plenty of water to make it turn. It is not only difficult to make up for the moisture after the double-turnover, but it will also affect the growth of mycelium. Second, rollover uneven. When turning the stack, the principle of “put raw material in the middle, put clinker on both sides; put two in the middle and put two in the middle†should be followed. However, many people do not follow the above principles when they turn over, so that the cultivation materials are not evenly fermented, and they cannot achieve the purpose of turning. Third, the mining requirements are not satisfactory. Some growers use unsterilized vegetable garden soil when covering the soil, while others add insufficiently cooked cow dung. This kind of nutrient soil contains a large number of bacteria and eggs, which can easily lead to various diseases and cause losses in production. Fourth, add urea when covering soil. New growers can easily equate mushroom growing with other crops, adding urea when covering the soil, causing ammonia odor to cause mycelium death. Fifth, spray "closed water." Spraying “closed water†at high temperature in the early stage of mushroom cultivation will cause a high-humidity environment, resulting in the emergence of mycelium, bacteria, and mushroom death. Spraying “closed water†at the later stage will make the hyphae degenerate and premature.