The invention discloses a delustering polypropylene filling material. The delustering polypropylene filling material is prepared from, by mass, 30 to 35 parts of polypropylene, 10 to 15 parts of quartz sand, 18 to 22 parts of plaster stone powder, 1 to 4 parts of an organic delustering agent, 1 to 3 parts of a foaming agent, 5 to 8 parts of natural fiber, and 0.5 to 1.5 parts of a processing auxiliary agent. The beneficial effects are that: combination of polypropylene with the organic delustering agent is adopted, the other raw materials are added, the obtained delustering polypropylene filling material is high in performance stability, is capable of solving joint problems, is excellent in compatibility, cohesive properties, is firm, is long in service life, and is capable of satisfying requirements of the building industry.