The invention discloses a dihydromyrcenol base silane coupling agent and a synthetization method thereof. The coupling agent is one of or two of the compounds with the structure disclosed in the formula (I) and the compound with the structure disclosed in the formula (II), wherein R is selected from methyl or ethyl, and R in the formulas (I) and (II) has the same meaning. The synthesis method hassimple operation and moderate reaction condition and is suitable for industrial production.