The new inorganic NLO ammonium bisulphate single crystal was synthesized by the slow evaporation method. The structure of the grown crystal was analyzed by X-RAY diffraction studies. The FT-IR spectrum confirms the presence of different functional groups of the grown crystal. Its optical transmittance is understood by UV-Vis-NIR spectrophotometer. The presence of SHG efficiency of the grown crystal was confirmed by Kurtz powder technique. The dissever nature of the crystal was analyzed by thermal studies. The mechanical behavior of the grown crystal is carried out at room temperature using Vicker's micro hardness tester, whenever the load increased, its hardness also increased. The elemental composition of the grown crystal was studied by EDAX analysis. The paramagnetic behavior of the grown crystal is confirmed by vibrating sample magnetometer.