Organosilyl ammoniym borohydride(2) was synthesixed via route of sol-gel process of otgansilyl ammonium chloride(1). The mole ratio of 1/1/4/2/1.0×1.0^-2 of 3-chloropropyltriethoxysilane/dimethydodecylamine/H₂O/THF/HCL(cat) was proved as an optimal condition on the synthesis of otgansilyl quarternary ammonium chloride. Inbotohydration reaction of organosilyl quarternary ammonium chloride, the prduction of organssilyl quarternary ammonium borohydride was identified by B-H stretching vibrations of 2371, 2320, 2274 cm ^-1 on avibrational spectroscopy. As a result, the intent of BH₄^- was found to be 2.0 mmol per one gram of organosilyl quarternary ammonium borohydride.