Zn(BH4)2-LiNH2 hydrogen storage materials was prepared by mechanical ball-milling using NaBH4, ZnCl2 and LiNH2 as raw materials. The Zn(BH4)2-LiNH2 hydrogen storage materials were characterized by means of X-ray diffraction(XRD), fourier transform infrared spectroscopy (FTIR), differential scanning calorimeter & DSC-TGA and hydrogen storage device. The results showed that Zn(BH4)2-LiNH2 composite system melt at 116 ℃ and decompose at 193 ℃ respectively. The composite release 0.015 mol/g gas at 150 ℃. At 200 ℃, the amount of gas capacity in Zn(BH4)2-LiNH2 composite system increase to 0.018 mol/g. It is found that enhancing the dehydrogenation temperature of Zn(BH4)2-LiNH2 has limited impact on its dehydrogenation dynamics. Zn(BH4)2-LiNH2 composite system is irreversible under the condition of 150 ℃and 0.1 MPa H2.