Pipe machining auxiliary device and construction method thereof

The invention relates to a pipe machining auxiliary device which comprises two sets of stand columns perpendicularly fixed to the ground. The two longitudinal beams are fixedly connected with the two sets of stand columns respectively, and the two ends of the longitudinal beams are fixed to the top ends of the stand columns; the main guide beam is vertically arranged at the lower ends of the two longitudinal beams; the upper end of the suspension machine is arranged on the main guide beam in a sliding manner, and the suspension machine is provided with a hook and is provided with a lifting rope for lifting a pipe; the bottom plate is fixedly arranged on the ground, and the bottom plate is located under the main guide beam; the limiting module is arranged at the end, close to the suspension machine, of the bottom plate; and the conveying module is used for unfolding and conveying the pipes to a machining device for machining. The pipe is hoisted to move through the suspension machine and fixed to the correspon