This kit is suitable for extracting genomic DNA from soil and feces. Add an appropriate amount of soil or feces into the grinding tube. Under the action of SP Buffer and Lysis S Buffer, shake the grinding tube vigorously, and the genomic DNA is released. Most impurities are removed with the method of centrifugation. The unique DA Buffer can effectively precipitate impurities, such as humic acid, protein, and polysaccharides. The released DNA is specifically bound to the magnetic beads, and the magnetic beads that bind the DNA are captured by the magnetic material. The contaminants are removed by multiple washing processes. Finally, the DNA is washed from the magnetic beads under the action of the elution buffer.