High-coaxiality machining auxiliary device for multi-intersection-point holes in limited space

The utility model relates to an auxiliary device for high coaxiality processing of a multi-intersection hole in a limited space. The device comprises a guide rail and a sliding block capable of sliding relative to the guide rail, wherein the reference arm and the auxiliary arm can be connected to the sliding block, the reference arm is provided with a reference positioning hole, the auxiliary arm is provided with an auxiliary positioning hole, and the reference positioning hole and the auxiliary positioning hole respectively correspond to the diameter of an intersection hole of a workpiece to be machined. According to the machining auxiliary device, high-coaxiality intersection point holes with different diameters and distances can be machined, the machining number of the coaxiality holes can be continuously increased according to the actual situation, and the machining device has universality. Besides, during use, coaxiality machining precision is high, the structure is simple and reasonable, operation is fa