The utility model discloses a gas pipeline embeds power generation system includes that the branch road pipeline, the detachably that connect in parallel with main gas transmission pipeline install power generation facility on the branch road pipeline and with the power output device that the power generation facility power output end links to each other, power generation facility includes pipe joint form casing, fixes the generator in the casing and be located the kuppe of sending out the motor dynamic input, the kuppe closes the bilayer that forms by inner cover body and dustcoat body group to gather together form water conservancy diversion structure, be equipped with fretwork baffling board on the entry terminal surface of kuppe, fretwork baffling board includes a plurality of centrosymmetric of being folded plate thin slices, and every folded plate thin slice has two opposite inclined planes, and two opposite inclined planes are located respectively in the inner cover body and between the inner cover body and the dustcoat body. The utility model discloses a gas pipeline embeds power generation system's kuppe can make the fluid flow way diminish, increased pressure, increase kinetic energy recovery efficiency.