The utility model discloses a gas -liquid two -phase blender, it includes outer body, the both ends of outer body are equipped with the connecting piece that is used for with pipeline connection respectively, outer pipe body inner cavity's forward -mounted has interior rectification tube bank, rear portion to install fixed vane, interior rectification tube bank is including many single tubes lastin, that arrange in proper order down, and the single tube body trend that single tube body trend that the single tube body trend that wherein lies in upper portion is " Z " type, middle part is " one" subtype, lower part is instead " Z " type, each single tube body front end is open structure, the rear end is seal structure, and is equipped with a plurality of dispersed round holes on the pipe wall at single tube body rear portion, fixed vane is the turbine form and fixes a plurality of blades including fixing the outer lane at outer pipe inner wall on the inner wall, constitute fluid passage between the adjacent blade. The utility model discloses simple structure, simple to operate and low cost install the duct section behind gas -liquid mixture, mix the effect through increasing substantially gas -liquid two -phase, guarantee follow -up measurement and detection achievement's accuracy.