It is because the filter mud of sugar factory contains a lot of organic matter, impurities and microorganisms, which will have a negative impact on soil and crops. Specifically, the organic matter and microorganisms in the filter mud of sugar factory are easy to cause soil acidification and fermentation, thus affecting soil fertility and crop growth. Impurities and heavy metals in it will pollute and poison the soil, posing a potential threat to human health and the environment. Therefore, in order to ensure the health and safety of soil and crops, sugar mill filter mud can not be directly used for farmland planting. Only through reasonable treatment and clean filtration, harmful substances and microorganisms can be removed and their impact on soil and crops can it be safely applied.