Underground multifunctional pipeline detection auxiliary device

The utility model relates to the technical field of in-well detection, in particular to an underground multifunctional pipeline detection auxiliary device, which comprises a plurality of rod parts, a pickaxe adapter, a lifting hook adapter and a rag adapter, each rod part is provided with length scales, and the plurality of rod parts are sequentially and detachably connected along the length direction of the rod parts. The pickaxe conversion head, the lifting hook conversion head and the cleaning cloth conversion head can be detachably installed at one end of the rod part. According to the underground multifunctional pipeline detection auxiliary device, a plurality of rod parts are connected, length scales are arranged on the rod parts, pipe diameter measurement of inspection wells with different depths can be achieved, a well lid is convenient to open through the design of a pickax adapter, a robot is convenient to hoist and put into the well through the design of a lifting hook adapter, and the detection ef