Bentonite is a non-metallic mineral with montmorillonite as its main mineral component because of its special properties. Such as swelling, adhesion, adsorption, catalysis, thixotropy, suspension and cation exchange, etc. Therefore, it is widely used in various fields of industry and agriculture. Therefore, it is called "universal soil". Montmorillonite can be used to remove toxins in cooking oil, purify gasoline and kerosene, and treat wastewater; used in drilling mud and flame retardant (suspended fire extinguishing); it can also be used as filler in the paper industry, and is widely used in the coating industry, textile industry, and cosmetics , medicine, paint, ink, aviation, cat litter, metallurgy, chemical fiber, petroleum, electronic equipment and other agricultural fields