Abstract: SnSb intermetallic compounds were prepared by chemical precipitation using NaBH4 as a reductive agent and SnCl2、SbCl3 as precursors and were tested to investigate the mechanism of electro-desulfurization of crude oil. The intermetallics were characterized by SEM-EDS for the morphology and element distribution on the surface of the SnSb before and after desulfurization. Gas chromatography-pulsed flame photometric detector（GC-PFPD）was used to analyze sulfur compounds in gasoline and diesel fractions separated from the crude oil before and after the test. The results indicate that the destructive adsorption of sulfur compounds occurred on the surface of the intermetallic and that desulfurization efficiency for sulfur compound with simple structure is high but relatively lower for larger sulfur species like dibenzothiophene. The used SnSb intermetallics can be regenerated by calcination、NaOH washing or toluene washing method with the toluene washing of the best.