The invention discloses a pipeline foreign matter clamping robot. The robot comprises a clamping mechanism and a travelling mechanism, wherein a rack I of the clamping mechanism is connected with a flange on a rack II of the travelling mechanism through bolts. According to the pipeline foreign matter clamping robot aims at the problem of foreign matters in a pipeline, the working cost is reduced,the combined pipeline robot capable of adjusting variable diameter is symmetrical in structure, good in stress, large in driving force and good in sealing, and the problem of cleaning the foreign matters in the pipeline is solved.