A　novel　method　for　successive　preparation　of　nano　metal　sols　by　pulsed　laser　ablation　at　the　interface　of　solid　and　flowing-liquid　is　developed　and　nano-iron/ethanol　sol　is　obtained　by　this　method.　TEM　results　show　that　the　iron　particles＇　sizes　are　mostly　between　10　similar　to　30　nm.　It　is　found　through　FT-IR　that　the　vibration　of　ethanol　molecule　groups　in　the　sol　is　affected　by　the　nano-iron　particles.　The　UV-vis　results　show　that　there　are　one　strong　absorption　peak　at　237.82　nm　and　two　medium　absorption　peaks　at　272.93　nm　and　308.43　nm.　The　effect　of　polyoxyethylene　(10)　lauryl　ether　(OP-10)　on　the　disperse　stability　of　nano-iron/ethanol　sol　is　studied　by　UV-vis　and　TEM　The　results　show　that　the　best　addition　of　OP-10　is　0.　10%　and　it　can　effectively　stabilize　the　dispersity　of　the　nano-iron/　ethanol　sol.