SnSe　material　is　one　of　the　most　promising　state-of-art　thermoelectric　materials.　The　polycrystalline　Ag-doped　Sn1-xAgxSe　(0.005　＜=　x　＜=　0.03)　bulks　were　prepared　by　mechanical　alloying　and　spark　plasma　sintering　technique,　and　the　composition,　microstructure　and　thermoelectric　properties　were　systematically　studied　by　XRD,　SEM　and　thermoelectric　performance　measurement.　XRD　results　show　that　single-phase　orthorhombic　SnSe-based　compounds　can　be　prepared　with　small　amount　of　Ag-doping　(0.005　＜=　x　＜=　0.01),　but　with　Ag　doping　amount　increasing,　small　quantity　of　secondary　phase,　SnAgSe2,　can　be　detected　in　the　matrix.　The　carrier　concentration　and　overall　electrical　properties　(power　factor)　are　significantly　enhanced　as　a　result　of　Ag　doping.　The　power　factor　of　Sn0.98Ag0.02Se　increases　up　to　0.495x10(-3)　W/(m.K-2),　which　is　about　36%　higher　than　that　of　SnSe　material.　Although　the　thermal　conductivity　increases　slightly,　the　dimensionless　figure　of　merit,　ZT　is　still　optimized　for　the　Ag-doped　samples.　Sn0.98Ag0.02Se　bulk　shows　optimal　ZT　value　and　the　highest　ZT　of　0.82　is　obtained　at　823　K,　which　is　the　highest　value　reported　for　the　polycrystalline　SnSe-based　thermoelectric　materials.