The SbSI rodlike crystals with studded pyramids were synthesized from the reaction among antiniony trichloride, thiourea, and excessive sodium iodide under moderate hydrothermal conditions at 200 degreesC. The final products were characterized by XRD, SEM, XPS, and elemental analysis. The SEM images showed the SbSI rodlike crystals are inserted some octahedrons on the surfaces of the rods. Typically, the structure is 3 4mm in length, 8-10 mum in diameter for a singular crystal. The size of the pyramids on the surface is about Wpm in height and the length of hemline is 6-12 mum.