NOVELTY - Extraction of insecticidal active material from Celosia argentea, involves (a) collecting whole plant tissue of C.argentea and crushing the material to obtain C.argentea powder, (b) mixing obtained powder with methyl alcohol and extracting mixture to obtain C.argentea extract, (c) mixing the extract with kieselguhr to obtain C.argentea crude-kieselguhr mixture, and (d) extracting crude-kieselguhr mixture using hexane and diethyl ether, collecting diethyl ether extract phase and concentrating the extract.    USE - The method is useful for extracting insecticidal active material useful as drug for prevention and agricultural destructive insect including ragonot of Rheum bipunctella, Astegopteryx bambusifoliae of Areca triandra, and Aleurodicus dispersus of russell, preferably Astegopteryx of triandra (all claimed).    ADVANTAGE - The method inexpensively extracts active insecticidal material from C.argentea and is environmentally-friendly.    DETAILED DESCRIPTION - Method of extracting insecticidal active material from Chinese herba Celosia argentea, involves (a) collecting whole plant tissue of C.argentea, washing the collected tissue, air-drying the washed material under shade in room at 45-55 degrees C, cooling the dried material, and crushing the cooled material to obtain C.argentea powder, where the whole plant tissue comprises root, stem, leaf, flower and seed, (b) mixing the obtained powder with methyl alcohol in volume ratio of 1:5-10, extracting the mixture for 12 hours or more to obtain C.argentea extract and concentrating the extract under reduced pressure until the extract changes into viscous paste to obtain the crude extract, (c) dissolving the crude extract with methyl alcohol, and mixing the dissolved extract with kieselguhr in weight ratio of 1:3-10 and volatilizing the solvent including methyl alcohol to obtain C.argentea crude-kieselguhr mixture, and (d) extracting the crude-kieselguhr mixture using hexane and diethyl ether, collecting diethyl ether extract phase, concentrating the extract under reduced pressure to the relative intensity of 0.25-1 g/cm3 to obtain insecticidal active material. An INDEPENDENT CLAIM is included for extract of insecticidal active material from Celosia argentea, which is obtained by above-mentioned method.