The deep hole trepanning head is a special tool for deep hole machine , which can reduce the cost in the production of the product. It can successfully put out a reusable rod material in the workpiece to be processed.   The cutting force is shared by four blades during the trepanning, the cutting is smooth, the chipping effect is good, and the cutting efficiency is high. It can be used to complete deep hole trepanning with a diameter of at least 100mm and a depth of 50 to 100 times.