The invention relates to a plant element composition and a preparation method thereof. The preparation method comprises a material preparation step, a small molecule step, a burdening step, a mixing step and a constant-temperature standing step, a finished product is obtained through the process steps. Therefore, the plant element composition disclosed by the invention has high content of superoxide dismutase-like activity; the content of heavy metals and the content of bacteria are low, so that the safety of a human body after taking can be guaranteed, the sterilization rate is high, the health of liver and gallbladder functions can be further promoted, the physiological function of the human body is more active, the immunity is enhanced, and the health can be kept and the human body is far away from diseases.一種植物素組成物及其製造方法,其係包含有備料步驟、小分子化步驟、配料步驟、混合步驟以及恆溫靜置步驟,透過上述流程步驟而完成成品,藉此,使得本發明之植物素組成物具有高含量之類超氧化物歧化酶活性,且重金屬含量以及生菌數含量低,可保障人體服用後之安全性,並具有高除菌率,且可進一步促進肝膽機能之健康,讓人體生理機能更活絡,增加免疫力而能常保健康,遠離疾病。