A double-face boring tool comprises a rough machining shaft box and a finish machining shaft box, wherein the rough machining shaft box and the finish machining shaft box are arranged correspondingly on a machine tool base. A machining mechanism is arranged on the machine tool base and comprises a working table rotating disc assembly, a Y-direction moving mechanism and a rotating mechanism. The working table rotating disc assembly comprises a working table and an inner gear ring, and the working table is connected to the upper end face of the inner gear ring in a fastened mode. The rotating mechanism comprises a rotating gear set, the lower end of the rotating gear set is connected with a Y-direction gear set in a meshed mode, and a driving gear is arranged at the upper end of the rotating gear set. When the working table moves upwards to a specific position under the action of the Y-direction moving mechanism, the driving gear is meshed with inner teeth of the inner gear ring and driven by a power driving mechanism to drive the working table to rotate. The working table of the double-face boring tool can vertically move under the action of the Y-direction moving mechanism and can rotate under the action of the rotating mechanism to move the position to be machined; machining precision is good, the structure is simple, and operation is easy.