Auxiliary fixing device for multi-linear guide rail of high-precision drilling machine

The invention relates to a multi-linear guide rail auxiliary fixing device of a high-precision drilling machine. A using method of the multi-linear guide rail auxiliary fixing device comprises the steps that S10, a gauge block in an auxiliary mounting kit is leveled; s20, leveling a left guide rail of the linear motor based on the auxiliary mounting kit; s30, the linear motor right guide rail is leveled based on the auxiliary mounting kit and the linear motor left guide rail; s40, leveling the left auxiliary guide rail based on the linear motor left guide rail, the linear motor right guide rail and the auxiliary mounting kit; and S50, the right auxiliary guide rail is leveled based on the linear motor left guide rail, the linear motor right guide rail and the auxiliary mounting kit. Compared with the prior art, installation of four conventional guide rails is rapidly achieved through the auxiliary fixing device, the requirement for high assembly precision of multiple guide rails of the high-speed drilling mac