NOVELTY - Preparing auxiliary material for biological pesticide using wastes of conifer plants, involves (a) adding wastes chosen from piles, roots and branches of conifer plants in several drums of iron heating bioreactors, distilling and cracking piles, roots and branches into liquid, and storing the extract, and (b) adding extract in an elliptical bioreactor, heating extract, cooling obtained product, transferring the cracked material into iron storage tank, detecting the product, and storing the product in the iron tanks.    USE - The method is useful for preparing auxiliary material, which is used as solvent source for pesticide to substitute organic solvents chosen from benzene, methylbenzene and dimethylbenzene.    ADVANTAGE - The method reduces pollution of chemically toxic solvent on environment. The auxiliary material is green, environmentally-friendly and biologically safe.    DETAILED DESCRIPTION - Method for preparing auxiliary material for biological pesticide using wastes of conifer plants, involves (a) adding wastes (200-300 kg) chosen from piles, roots and branches of conifer plants in several drums of iron heating bioreactors based on the specific length and weight, where every bioreactor is cylindrical with bottom diameter of 1 m and height of 2 m, and the bioreactor is welded by steel plates of 0.5 cm, covering top portion of the drums, heating the wastes for 8-12 hours, distilling and cracking piles, roots and branches into liquid when the temperature reaches 350 plus minus 30 degrees C, transferring the cooled extract to an iron storage tank through outlet pipes of the bioreactors, and storing the extract, where the initial extract prepared by reacting piles, roots and branches using the bioreactors is cracked secondarily based on specific process course to obtain the auxiliary material, and (b) adding extract (3-5 times) in an elliptical bioreactor welded by thickened steel plates, heating the extract to 300-500 degrees C from the bottom portion of the elliptical bioreactor, where the upper portion of the bioreactor has feed-in switch, the left side has outlet switch for auxiliary product and the right side has spiral pipe, cooling the obtained product using water, transferring the cracked material into iron storage tank, detecting the product, storing the product in the iron tanks of 200 kg and 100 kg, and labeling the tanks for further use.