Pipeline crawling robot

The invention provides a pipeline crawling robot and belongs to the technical field of pipeline maintenance equipment. The pipeline crawling robot comprises two crawling bodies; climbing claws are arranged on the crawling bodies; the climbing claws are used for clamping a pipeline or loosening the pipeline; the crawling bodies are used for being fixed to the pipeline or separated from the pipelinethrough the climbing claws; a first driving unit is arranged between the two crawling bodies; one of the crawling bodies is used for moving along the pipeline by means of the first driving unit whenthe other crawling body is fixed to the pipeline; contact units are arranged on the climbing claws and used for approaching or going far away from the pipeline along with clamping or loosening of theclimbing claws; and the contact units are provided with attaching parts which are movably connected with the climbing claws so that the attaching parts can be tightly attached to the outer wall of thepipeline. By means of the p