The　effects　of　dynamic　strain　aging　(DSA)　on　mechanical　properties　of　materials　have　attracted　more　and　more　attention　in　recent　years.　The　tension　tests　of　18-8　type　austenitic　stainless　steel　were　carried　out　at　strain　rate　of　5　×　10-4　and　different　temperatures　(298-973　K)　to　investigate　the　effect　of　temperature　on　its　mechanical　properties.　It　is　found　that　the　serrated　flow　behavior　of　this　material,　one　of　the　evident　features　of　dynamic　strain　aging　(DSA)　phenomenon　occurs　in　the　temperatures　of　523-673　K　and　723-873　K　at　strain　rate　of　5　×　10-4　s-1.　The　microstructures　after　DSA　pretreatment　of　this　material　have　been　systematically　investigated.　The　results　show　that　the　interaction　between　the　moving　dislocation　and　solute　atom　during　DSA　makes　dislocation　configuration　change.　With　increasing　pre-strain　temperature,　the　dislocation　density　increases　and　forms　more　complex　and　more　stable　dislocation　structure.