A combined type pipeline mixer at least comprises a first section of pipe and a second section of pipe which are communicated with each other, the first section of pipe is a dumbbell-shaped pipe body,a throat part is arranged at the minimum inner diameter position of the first section of pipe, and the inner wall of the throat part is spiral so as to form turbulent flow; the second section pipe isa dumbbell-shaped pipe body, and an air filling port is formed in one end, close to the first section pipe, of the second section pipe, so that air is blown into the second section pipe to strengthenthe turbulence condition of the fluid section. The utility model discloses a combined pipeline mixer. The device comprises a first-section pipe and a second-section pipe, through at least two sections of pipes with contraction and diffusion functions and the spiral design of the throat part, high-speed air is added into the two sections of pipes, so that more than two added medicaments are mixedmore uniformly, and compared with the conventional mixing tank or mixer, the mixing tank or mixer has the advantages of no need of adding a stirrer, high efficiency, energy conservation, small occupied area and the like.