To reduce the electrostatic sensitivity of α-AlH₃, α-AlH₃ was coated by the solvent-nonsolvent method using stearic acid (SA) as coating material. The crystal structure and morphology of samples before and after coating were characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), elemental analysis and scanning electron microscopy (SEM). The electrostatic sensitivity of α-AlH₃ samples before and after coating was measured by JGY-50Ⅲ type static spark sensitivity tester according to GJB5891.27-2006 method. Results show that a complete, uniform coating layer of SA is formed on the surface of α-AlH₃. The crystal structure and morphology of the sample after coating are not changed. When the spark energy required for 50% initiation probability (E₅₀) decreases from 367 mJ before coating to test limit 5390 mJ, the fire does not occur. The coating makes the electrostatic sensitivity reduce.