The invention relates to the technical field of flow damping of fluid pipeline conveying, in particular to a damping pipeline capable of realizing fluid damping based on electrolytic micro bubbles. The damping pipeline comprises an inner barrel, an electrode assembly and two variable-diameter outer tubes, wherein each electrode is embedded into a corresponding blocking slot; and each variable-diameter outer tube comprises a main flow section and an electrolytic section which are fixedly connected with each other. The damping pipeline can gather micro bubbles generated by electrolysis at the edge of fluid, so that great inhibition effect on strength and frequency of a liquid turbulent-flow bursting event on a position, close to the wall surface, of a pipeline is achieved, turbulent-flow reynolds stress of conveyed liquid is reduced, and turbulent-flow friction resistance of the liquid is reduced, and therefore, the relatively good damping effect is realized; moreover, the whole dampingpipeline is simple in structure, is easy in implementation, is relatively convenient and quick in replacement while electrodes are aged or damaged, can conveniently apply the damping pipeline on an existing fluid conveying pipeline while realizing extremely low cost, and is beneficial for application of the practical engineering field.