US　nanoarods　have　been　synthesized　by　using　Cetyltrimethyl　Ammonium　Bromide　(CTAB)　as　the　soft　template　under　gamma-irradiation　through　the　reaction　of　cadmium　sulphide　(CdSO4　center　dot　8/3H(2)O)　and　thiacetamide　(TAA)　in　acidic　condition　for　pH　value　of　3.　The　physical　and　chemical　properties　and　the　structure　of　US　nanorods　were　characterized　by　XRD,　UV-Vis,　SAED,　TEM　and　PL.　The　results　indicate　that　US　nanorods　synthesized　by　soft　template　method　are　below　100　nm　in　diameter　and　above　3　nm　in　length,　and　low　irradiative　dosage　and　concentration　of　reactants　can　accelerate　the　formation　of　US　nanorods　with　higher　length-to-diameter　factor　about　30:1　range.