This product is a modified novel eco-friendly plasticizer originating from plant oil, with physical form of brown or dark brown viscous liquid at normal temperature, and characteristics of low heat generating, low polarity, migration resistance, no discoloration, excellent soluble resistance, high storage stability, etc. As compared to the petroleum-based eco-friendly plasticizer commonly used in the market, this product is with excellent thermal-weight-loss-resistance at high temp, solving the technical problems of causing strong smell and harms to the workshop and the surrounding environment during the rubber processing.