A pipeline static mixer comprises a dosing opening, a mixing tube, a mixing rod and a connecting flange, the dosing opening is arranged above the mixing tube, the mixing tube is arranged in the mixing tube, the end portion of the mixing tube is provided with the connecting flange, the connecting flange is provided with bolt holes, the bolt holes are distributed at two sides of the mixing tube, the mixing tube is provided with a spinous mixing blade, the spinous mixing blade is arranged on the body of the mixing rod, the inner wall of the mixing tube is provided with an anticorrosive layer, and the anticorrosive layer is a nanometer ceramic layer. The mixing rod is provided with the spinous mixing blade, so raw materials are fully mixed, the content of a flocculating agent in water reaches a degrading standard, and heavy metals in wastewater are rapidly and uniformly eliminated; and the inner wall of the mixing tube is provided with the anticorrosive layer, so anticorrosion ability of the mixing tube is enhanced, damages of chemical substances to the wall of the tube are reduced in the practical mixing work process, and accumulation of the raw materials in the tube is prevented.