Aiming at the issues of internal wall corrosion and adhesive dust in steel plant gas pipelines，a silicon polymer modified liquid resin-inorganic filler composite coating was prepared by sol-gel method using fumed silica，silicon carbide，colloidal graphite，flake graphene and silicon polymer modified liquid resin as raw materials. The wettability，mechanical strength，anticorrosive and anti-scaling properties of the coating were studied. The results showed that the coating exhibited，the surface energy was 25. 91 mJ/m²，which was 41. 58% lower than that of carbon steel，and the contact angle was 120. 1 °，exhibiting excellent hydrophobicity. The adhesion strength was grade 1，and almost unaffected bytemperature variations. The water contact angle remained greater than 105 ° after sandpaperabrasion，demonstrating good wear resistance. The maximum corrosion rates in sulfuric acid， hydrochloric acid and sodium chloride solutions were 12. 36 mg/（cm².h），9. 89 mg/（cm².h）， and 2. 55 mg/（cm².h），respectively，which was 73%，74%，and 83% lower than that of carbon steel. Additionally，the coating could effectively inhibit the crystallization and adhesion of NH₄Cl. There were no significant corrosion or scaling was observed on the coated pipelinesurfaces in a five-month continuous corrosion and scaling resistance application test. Benefiting from the hydrophobic micro-nano structure formed by fumed silica molecules oncoating surface，"maze-like" structure created by the overlapping fillers，and the synergistic effects of colloidal graphite and silicon carbide，the coating showed excellent anticorrosive and anti-scaling properties.