Machining tool

The utility model discloses a machining tool. A drilling reamer is detachably installed at the center of the lower surface of a main tool base through a locking screw, and is composed of drilling reamer bodies formed integrally and used for machining parts of different apertures, wherein the drilling reamer bodies for machining large-aperture parts are located between the main tool base and the drilling reamer bodies for machining small-aperture parts. The two sides of the lower surface of the main tool base extend downwards to form additional tool bases. Cutting blades are detachably installed on the additional tool bases through locking screws. Edges of the cutting blades are each composed of two vertical edge bodies formed integrally and used for cutting parts of different diameters. Steps holes of workpieces and steps of outer surfaces of the workpieces can be machined according to requirements, or only the step holes of the workpieces are machined, or only the steps of the outer surfaces of the workpieces are machined, no matter whether to machine the step holes and the steps alternatively or both, the tool can conduct machining at a time, and efficiency is greatly improved.