NOVELTY - Producing temperature controlled sustained release fertilizer, involves 1) preparing coat film liquid: uniformly mixing and stirring the solute and solvent for coat film at ratio of 1:16.5-17.5, heating to 140-160 degrees C for melting to prepare into temperature controlled sustained release fertilizer coat film; 2) spraying temperature controlled fertilizer coat film: adding the raw material to a spray tower, spraying a coat liquid to the fertilizer, and adding a coat film liquid and the raw material to a spray tower for spraying; 3) processing waste gas; and 4) packaging finished product.    USE - For producing temperature controlled sustained release fertilizer (claimed).    ADVANTAGE - The coated fertilizer has high fertility and fertility supplying ability. The coat film liquid is featured with broad raw material source and low cost. The method avoids environment pollution in processing, is easy, requires low equipment investment, and provides easy realization.    DETAILED DESCRIPTION - Producing temperature controlled sustained release fertilizer, involves 1) preparing coat film liquid: uniformly mixing and stirring the solute and solvent for coat film according to the ratio of 1:16.5-17.5, heating to 140-160 degrees C for melting to prepare into temperature controlled sustained release fertilizer, where the solute for coat film is composed of high molecular polymer polyethylene (PE), polypropylene (PP), polystyrene (PS) and opening agent according to the ratio of 2:7:2:1, the solvent is natural turpentine, the coat film prepared by the coat film liquid is featured with high coat film penetration and high toughness, where natural turpentine is added to the coat film liquid, so the temperature controlled fertilizer emits natural fresh scent, the open size of the bell-mouth on the coat film is controllable so that the nutrition release is accordant with the temperature, and the natural turpentine plays a role of expelling parasite; 2) spraying temperature controlled fertilizer coat film: adding the raw material to a spray tower through a fertilizer feed hole, suspending the fertilizer in the spray tower through the gas transmitted in the circulating system, and pre-heating to 85-95 degrees C to spray the coat film liquid, entering the spray tower through the coat liquid inlet in the spray tower according to the prepared coat film liquid, spraying the coat liquid to the fertilizer with the help of an air pipeline, and adding the coat film liquid and the raw material to the spray tower for spraying according to the best design proposal, where in spraying, the set temperature is 140-160 degrees C, and the pressure is 0.1 MPa so as to realize the best spray effect; making the waste gas generated in the spray tower enter a recycling groove through a condensing system so as to recycle the substance, save resource, lower cost, and improve resource utility ratio; 3) processing waste gas: making the waste gas generated in the spray tower enter a condensing system through a dust remover, performing three-grade condensing so as to recycle the solvent, and circulating for realizing energy preservation and environment friendliness; making the purified afterheat air enter the heater circularly so as to improve the raw material temperature and package the temperature controlled sustained release fertilizer conveniently; and 4) packaging finished product: after successfully coating the finished temperature controlled sustained release fertilizer in a spray bed coater, sending to a conveying belt through a material collector so as to send to a storage bin, and packaging after metering electronically.