A multi-row synchronous rotating injection device for assisting sintering includes a sintering pallet. An injection sealing cover is arranged above the sintering pallet. At least one gas blowing pipeand at least one gas branch pipe are arranged above the sintering pallet in the injection sealing cover. Each gas branch pipe is connected with at least one gas blowing pipe. A gas main pipe is arranged outside an injection sealing device. The gas branch pipe is connected with the gas main pipe and the gas blowing pipe through the injection sealing device. The gas blowing pipe includes an injection pipeline and an injection pipe blowing holes. One group of injection pipe blowing holes is formed circumferentially in the injection pipeline. At least one group of injection blowing holes is distributed in sequence in an axial direction of the injection pipeline. One group of injection pipe blowing holes has at least two injection pipe blowing holes. A plugging pipe is arranged in the injectionpipeline in the coaxial line. The plugging pipe is provided with at least one cavity opening to the injection pipe along the axis direction. The part outside the cavity is a solid or a hollow cavitysealed at both ends. The plugging pipe is connected to a driving device for driving the plugging pipe to rotate.