Digestion tank turning tool

The utility model relates to a digesting tank turning tool. The tool is characterized in that a rod body whose length is more than ten times as large as the diameter is included, a tank bottom cutting edge and an inner wall cutting edge are arranged on the head of the rod body, the tank bottom cutting edge and the inner wall cutting edge are in smooth transitional connection and are located on the intersection portion of a front cutter surface and a rear cutter surface of the head portion of the rod body, an angle of elevation of 13 degrees exists between the front cutter surface and the center line of the rod body, the head of the front cutter surface is higher than the root of the front cutter surface, the curvature radius of the tank bottom cutting edge is equal to that of a tank bottom, the inner wall cutting edge protrudes out of the outer cylindrical side surface of the rod body, and the rear cutter surface and the outer cylindrical side surface of the rod body are in smooth transitional connection. The turning tool has the advantages that the long rod body is adopted, the inner wall cutting edge protrudes out of the outer cylindrical side surface of the rod body, the rear cutter surface is in smooth transitional connection with the outer cylindrical side surface of the rod body, and the inner wall and the bottom of a tank body can be machined once. The situations that scraps break and the scraps scratch the surface of the machined inner wall are avoided due to the fact that the rotation speed and the feeding speed are low, machining smoothness of the inner wall of the tank body is improved and smoothness of the inner wall of the tank body is guaranteed.