Fully automatic digestion instrumentBy adopting the principle of wet digestion, specifically designed for the field of inorganic sample pretreatment, all processes such as acid addition, shaking, heating, and constant volume are automatically controlled by computers, greatly improving the safety of digestion operations, greatly reducing personnel injuries caused by acid contact, and significantly improving sample consistency and repeatability. In addition to adding reagents, shaking and heating samples, the system also includes a standard method library, which has multiple functions such as adjusting sample volume after digestion, and recording each step in the digestion process.