The invention discloses a formula of a high-refraction and high-tenacity silicone rubber for a fluorescent film. The silicone rubber is formed by mixing rubber A and rubber B at the proportion of 5:1-11.5:1. The rubber A is prepared from 40-50 parts of methyl phenyl silicone resin, 20-30 parts of phenyl silicone oil, 2-6 parts of a platinum-based catalyst, 1-10 parts of white carbon black, 5-10 parts of a coupling agent and 1-5 parts of a mold release agent. The rubber B is prepared from 25-45 parts of methyl phenyl silicone resin, 30-40 parts of phenyl hydrogen-containing silicon oil, 15-25 parts of vinyl MQ resin, 0.5-1 part of an inhibitor and 1-6 parts of a tackifier. The rubber A and the rubber B are evenly mixed and defoamed, after heat preservation is performed for 1 h at 80 DEG C, the mixture is heated to 150 DEG C and subjected to heat preservation for 1 h, and after mold release, the solid silicone rubber is obtained. After the silicone rubber and fluorescent powder are mixed and cured, the fluorescent powder will not settle, the binding force of a chip and the silicone rubber is large, mold release is easy, and the requirements of chip-level LED packaging for the silicone rubber can be met.