The utility model discloses a modified high-temperature-resistant air inlet silicone tube of an air filter. The silicone tube comprises a silicone tube main body, a heat shrinkable tube and a limitingblock, wherein an air inlet is formed in one end of the silicone tube main body; an air outlet is formed in the end, away from the air inlet, of the silicone tube body. Protruding blocks are evenly distributed on the side portion of the silicone tube body. The heat shrink tube is sleeved outside the silicone tube main body; the limiting blocks are evenly distributed in the heat shrink tube, the protruding blocks and the limiting blocks are arranged in a staggered and attached mode, a containing cavity is formed among the protruding blocks, the heat shrink tube and the limiting blocks, the containing cavity is filled with heat preservation cotton, rubber rings are installed on the inner walls, close to the air inlet and the air outlet, of the silicone tube body, and grooves are formed in the inner sides of the two sets of rubber rings. The strength of the silicone tube body is improved through the protruding blocks, the heat shrink tube shrinks under the high-temperature condition to extrude the limiting blocks and the protruding blocks, large thermal expansion of the silicone tube body is avoided, and the silicone tube body is prevented from being damaged.