This　paper　focuses　on　laminar　axisymmetric　radial　flow　field　structure　influenced　by　inlet　pipe　Reynolds　number　and　geometrical　aspect　ratio　in　the　spacing　region　which　consists　of　two　parallel　discs.　Numerical　method　and　particle　image　velocimetry　technique　have　been　employed　to　analysis　the　evolution　of　flow　field　structure　at　different　Reynolds　numbers　and　the　flow　separation　and　reattachment　points＇　position　of　different　isolated　vortexes　at　different　aspect　ratios.　Results　show　that,　according　to　the　number　of　vortexes,　the　radial　flow　pattern　will　gradually　present　four　different　stages　with　inlet　pipe　Reynolds　number　increases.　And　there　exist　significant　relationships　among　the　radial　position　of　the　flow　separation　and　reattachment　points　of　different　isolated　vortexes.