Nut shell activated carbon is widely used in the deep purification of drinking water, industrial water and wastewater as well as gas phase adsorption, such as power plant purification, such as power plants, petrochemicals, oil refineries, food and beverage, sugar, wine, medicine, electronics, fish farming, shipping, etc. It can effectively adsorb free chlorine, phenol, sulfur and other organic pollutants in water, especially the precursor substances of the mutagen (THM), to purify and remove impurities and odor. It can also be used for industrial exhaust gas purification, gas desulfurization, petroleum catalytic reforming, gas separation, pressure swing adsorption, air drying, food preservation, gas mask, solvent carrier, industrial solvent filtration, decolorization and purification. Separation, purification, purification of various gases; recovery of organic solvents; decolorization, deodorization, refining of sugar, monosodium glutamate, medicine, alcohol, beverages; refining of precious metals; catalysts and catalyst carriers in the chemical industry. The product has the functions of decolorization, purification, impurity removal, deodorization, odor removal, carrier, purification and recovery.