1. A controlled release composition for the manufacture of a sustained release preparation of udenafil comprising udenafil and a pharmaceutically acceptable salt thereof； a solubility modulator selected from organic acids, including citric acid, malic acid, adipic acid, maleic acid, ascorbic acid, succinic acid, and tartaric acid； an adsorbent selected from silicon dioxide, calcium silicate, talc and aluminum-magnesium metasilicate； a hydrophilic polymer selected from hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxypropyl methyl cellulose, polyethylene oxide, xanthan gum, guar gum, locust bean gum and sodium alginate. 2. The controlled release composition of claim 1, wherein the solubility modulator is citric acid. The controlled release composition according to claim 1, wherein the adsorbent is silicon dioxide. The controlled release composition according to claim 1, wherein the hydrophilic polymer is selected from hydroxypropyl methylcellulose and polyethylene oxide. The controlled release composition according to claim 1, further comprising a pore-forming substance. The controlled release composition of claim 1, further comprising a swelling agent. The controlled release composition of claim 1, further comprising a diluent. A controlled release composition according to claim 1, further comprising a lubricant. A method of obtaining a controlled release composition for the production of a sustained release preparation containing udenafil1. Композиция c контролируемым высвобождением для производства содержащего уденафил препарата с замедленным высвобождением, включающаяуденафил и его фармацевтически приемлемую соль；модулятор растворимости, выбранный из органических кислот, включая лимонную кислоту, яблочную кислоту, адипиновую кислоту, малеиновую кислоту, аскорбиновую кислоту, янтарную кислоту и винную кислоту；адсорбент, выбранный из диоксида кремния, силиката кальция, талька и метасиликата алюминия-магния； игидрофильный полимер, выбранный из гидроксиэтилцел
