NOVELTY - Preparing composite traditional Chinese medicine, comprises taking aconite, flos datura, light arrowhead, bitter almond, radix rehmanniae and croton, adding 6 pts. wt. spicy pepper, sealing, storing, processing raw material by drying, crushing a pulverizer having 0.5 cm diameter screen, crushing pepper into 300-mesh using superfine pulverizer, then uniformly mixing, sealing, and carrying out hot filtration, carrying out hot dip galvanizing, filtering hot liquid by passing through hot-dip device filter cylinder, collecting the filtrate, and placing into stainless steel container, and sealing.    USE - The method is useful for preparing composite traditional Chinese medicine (claimed).    ADVANTAGE - The method produces product having insecticidal property, so as to replace chemical pesticide, and is environmental-friendly (claimed).    DETAILED DESCRIPTION - Preparing composite traditional Chinese medicine, comprises taking aconite, flos datura, light arrowhead, bitter almond, radix rehmanniae and croton, adding 6 pts. wt. spicy pepper, sealing, and storing, processing raw material by drying, crushing a pulverizer having 0.5 cm diameter screen, crushing pepper into 300-mesh using superfine pulverizer, then uniformly mixing, sealing, and carrying out hot filtration, sealing filtering during hot gas heating or electric heating sealing hot-dip, filtering using an integrated device, carrying out hot-dipping, filtering, soaking when the material is hot, opening a sealing cover using a hot seal device located outside cylinder, where cylinder bottom is installed with 100 meshes stainless steel sieve screen of a hot-dip device filter cylinder, and the cylinder volume is less than 20, adding raw material with tap water in a ratio of 5:100, adding raw material into a hot-dipping device of filter cylinder, adding tap water again up to boundary edge, stirring, adding water to a level of submerging raw material, then covering 100 meshes screen filter cylinder, heating while soaking so as to prevent raw material overflow, and covering hot sealing device sealing cover, heating, carrying out hot dip galvanizing for 1 hour, opening hot-dip device located outside cylinder bottom valve, filtering hot liquid by passing through hot-dip device filter cylinder, collecting the filtrate, and placing into stainless steel container, sealing, filtering the precipitate, cooling the filtering liquid in stainless steel container, where the stainless steel container is installed with a moving base, precipitating for 15-20 days, filtering liquid, to obtain clear liquid, opening steel container lower part valve, taking out supernatant, to obtain the final product.