The　heat-resistant　coating　prepared　by　silicone　rubber　and　inorganic　fillers　has　important　application　prospects　in　heat-resistant　and　corrosion-resistance　environments.　In　this　paper,　self-made　modified　silicone　rubber　was　used　as　the　matrix,　and　different　proportions　of　kaolin,　silica　and　alumina　were　added　to　prepare　the　composite　coatings.　The　dispersion　of　inorganic　fillers　in　silicone　rubber　matrix　was　observed　by　scanning　electron　microscopy　(SEM).　The　pyrolysis　temperature　and　weight　loss　rate　of　the　composite　coatings　were　analyzed　by　thermogravimetric　analyzer　(TGA).　Results　show　that　in　the　composite　system,　the　inorganic　filler　has　good　compatibility　with　the　matrix　and　is　uniformly　dispersed.　Compared　with　the　matrix　material,　the　addition　of　inorganic　fillers　can　effectively　improve　the　heat　resistance　of　the　composites.　The　mass　residual　rate　at　800　℃　of　the　composite　coating　with　20%　filler　content　is　more　than　10%　higher　than　that　of　the　self-made　modified　silicone　rubber　matrix.　©　2025　Beijing　University　of　Technology.　All　rights　reserved.