Auxiliary tool for machining in narrow space

The utility model discloses a narrow space machining auxiliary tool which comprises an installation reference rod and a part body arranged on one side of the installation reference rod, the installation reference rod is arranged to be in a cone shape, and a left-hand thread is arranged at one end of the installation reference rod. The polishing grinding head comprises a first polishing grinding head and a second polishing grinding head; each grinding connecting rod is provided with a right-hand thread used in cooperation with the corresponding left-hand thread, and each grinding connecting rod is used in cooperation with the corresponding grinding head; and each of the two rotating mechanisms is mounted on the corresponding polishing connecting rod. According to the utility model, the angle of the grinding head is changed, so that the grinding head can better grind and process a corner at a narrow space of a part body, the processing is more in place and comprehensive, and the surface quality can meet the req