The invention relates to a pipeline structure used for conveying materials. The pipeline structure comprises a transversely placed pipeline and a material walking slope, wherein racks are mounted at the bottom of the pipeline at an interval; the material walking slope is arranged at the bottom in the pipeline; the structure of the slope is that: a first slope is arranged in the middle of the right end in the pipeline, a first platform is connected with the first slope, transition is carried out between the first slope and the first platform through a first oblique surface, transition is carried out between the front end of the first platform and a second platform through a second oblique surface, the front end of the second platform is provided with a second slope, the end part of the second slope is flush with the left end part of the pipeline, and a door is mounted at the left end part of the pipeline through a hinge assembly; the two ends of the top of the pipeline are separately provided with material inlets; and an air inlet is arranged at the upper part of the right end of the pipeline, and the air inlet is connected with a fan. The work is highly reliable and safe, the cost is low, and the service life is long.