NOVELTY - Preparation of environmental regulation agent comprises using oxygen and ammonia gas as gas source, performing intermittent irradiation treatment of attapulgite powder under vacuum condition; performing pyrolysis; mixing aminated attapulgite and biological micro-nano silicon/carbon, to obtain loss control auxiliary agent; adding titanium dioxide and methylene orange, adding water, centrifuging, drying and crushing; mixing loss control auxiliary agent and controlled degradation auxiliary agent, adding triiodobenzoate; and preparing into suspension.    USE - Method for preparing environmental regulation agent used for adjusting Chinese tallow tree, Rhus chinensis, soapberry seed and woody plant (claimed).    ADVANTAGE - The plant height is increased 2-4 times, crown diameter is reduced by 2-4 times and branch is increased by 3 times.    DETAILED DESCRIPTION - Preparation of environmental regulation agent comprises:    (A) using oxygen and ammonia gas as gas source at 500-1000 degrees C, performing for intermittent irradiation treatment of 100-800 mesh attapulgite powder under vacuum condition at 1-3 kW, treating for 5-10 minutes, stopping for 5-10 minutes, where total irradiation time is 30-60 minutes to obtain concave-convex rod crystal aminated attapulgite;    (B) performing pyrolysis at 500-800 degrees C in nitrogen anaerobic condition, using muffle furnace, for 50-100 minutes to obtain biological micro-nano silicon/carbon;    (C) mixing aminated attapulgite and biological micro-nano silicon/carbon at mass ratio of 3-5:1-2, mixing uniformly to obtain loss control auxiliary agent;    (D) adding 200-800 mesh titanium dioxide and methylene orange at mass ratio of 1-3:2-10, mixing uniformly, adding water to prepare into 5-10 g/L suspension, stirring at 40-60 degrees C and rotating speed of 100-200 revolutions per minute (rpm) for 20-40 minutes, performing centrifugation, drying and crushing to obtain methylene orange titanium dioxide controlled degradation additive;    (E) mixing loss control auxiliary agent and controlled degradation auxiliary agent at mass ratio of 3-5:1-2, mixing uniformly to obtain auxiliary agent, adding 15-25% 300-800 mesh triiodobenzoate to obtain sustained-release, controlled degradation triiodobenzoate; and    (F) preparing sustained-release, controlled degradation triiodobenzoate into 0.5-4.0 mM suspension, using by uniformly spraying fine mist, spraying in morning or evening spraying 1-3 times every other day.