The invention discloses chemical pump inner cavity insulated oil paint, and relates to the technical field of pump valve preparation. The chemical pump inner cavity insulated oil paint is prepared from the following raw materials in parts by weight: 50-60 parts of chlorinated rubber resin, 25-35 parts of butadiene styrene rubber resin, 30-40 parts of fluorocarbon resin, 6-8 parts of pentaerythritol, 3-5 parts of tall oil acid, 6-8 parts of castor oil, 10-20 parts of polyphenylene sulfide, 5-7 parts of polymerized rosin, 3-5 parts of sepiolite powder, 5-7 parts of wollastonite powder, 6-8 parts of epoxy linseed oil, 3-5 parts of sodium pyrophosphate, 6-8 parts of copper oxide powder, 3-5 parts of nanometer titania, 6-8 parts of kaolin, 5-7 parts of glass fiber, 6-8 parts of rare earth chloride, 20-30 parts of modified asphalt and 120-130 parts of water. The chemical pump inner cavity insulated oil paint has the beneficial effects that the prepared oil paint has excellent insulating property, the insulating property between a chemical pump body and a fluid can be effectively protected, normal operation of a chemical pump is guaranteed, and the service life of the chemical pump is prolonged.