NOVELTY - Preparation of biodiesel shiny-leaved yellowhorn oil comprises pre-processing, fully mixing methanol and pre-processed standard raw oil in reactor, mixing with solid super acid catalyst, forming mixed material, putting gas oil into diesel middle tank, putting activated carbon into 0.5 M hydrochloric acid solution, boiling for 2 hours, dissolving zirconium sulfate zirconium sulfate into water, adding processed activated carbon into water, evaporating mixture in container, shifting mixture to muffle, drying at 300-350 degrees C until constant weight, and discoloring gas oil.    USE - Method for preparing biodiesel (claimed).    ADVANTAGE - The method utilizes easy to obtain biodiesel production raw material, is environment-friendly, uses activated carbon and catalyst having high selectivity, less side reaction, does not corrode the device, and the catalyst is easily separated from liquid phase, and reduces content of pollutant.    DETAILED DESCRIPTION - Preparation of biodiesel shiny-leaved yellowhorn oil comprises pre-processing; fully mixing methanol and pre-processed standard raw oil in reactor, mixing with solid super acid catalyst, forming mixed material, with mass ratio standard raw oil, methanol and catalyst at 100:25-30:3-5, heating mixed material at 68-72 degrees C, refluxing methanol back via condenser, stirring and mixing for 120-180 minutes, detecting content of methanol of more than 96%, and subsiding reaction mixture and layering into glycerol phase and gas oil, centrifuging, removing glycerol and refining glycerol phase, and putting gas oil into diesel middle tank, putting activated carbon with diameter of 0.9-1.2 mm into 0.5 M hydrochloric acid solution, boiling for 2 hours, using clean water to wash until neutral, and drying at 110 degrees C until constant weight, loading by zirconium sulfate and activated carbon at ratio of 2:10-15, and dissolving zirconium sulfate zirconium sulfate into water; adding processed activated carbon into water, continuously adding water until liquid level covers solid, adding distilled water (10-20%), boiling for 2 hours, evaporating mixture in the container, shifting mixture to muffle and drying at 300-350 degrees C until constant weight; and discoloring gas oil.