Pipeline groove machining auxiliary device

The utility model belongs to the technical field of pipeline groove machining, and particularly relates to a pipeline groove machining auxiliary device which comprises a machining table, lifting supporting devices are fixedly connected to the four corners of the lower surface of the machining table respectively, and a positioning device and a fixing device are arranged on the upper surface of the machining table. According to the pipeline groove machining auxiliary device, when the height needs to be adjusted, a fixing rod is pressed backwards, a telescopic spring is extruded to enable the fixing rod to slide into a spring cavity, then a sliding sleeve is pulled downwards, when the sliding sleeve moves downwards to fixing holes in other heights, the fixing rod pops up under the elastic action of reset of the telescopic spring, and therefore the height of the sliding sleeve is fixed; the function of adjusting the height of the machining table is achieved, when the machining table faces pipelines with different