Droplets　formed　in　different　Y-angles　(45°,　90°,　135°,　180°)　and　flow　flux　of　two-phase　in　Y-junction　microchannels　are　studied　by　making　use　of　micro-PIV,　high　speed　digital　microscopic　system　and　numerical　simulation　in　this　paper.　It　is　found　that　the　shearing　action　impels　the　formation　of　dispersed　phase　droplet　in　the　squeezing　mechanism,　and　the　smaller　Y-angle　results　in　the　bigger　shearing　action　suffered　by　dispersed　phase.　The　continuous　phase　velocity　profile　is　asymmetric　parabolic　distribution　in　droplet　generation　process.　When　Y-angle　is　less　than　180°,　it　does　not　affect　the　droplet　diameter　size　but　will　speed　up　the　droplet　generation　as　it　decreases.　The　droplet　size　and　generated　cycle　will　be　the　largest　in　the　case　of　Y-angle　being　180°.　It　is　indicated　that　Capillary　number　affects　droplet　size　and　generation　time　simultaneously.　The　increasing　capillary　number　of　continuous　phase　will　make　the　acting　force　from　continuous　phase　to　dispersed　phase　more　intensive　in　the　junction　of　the　two　phases　in　the　in-plane　velocities　in　the　continuous　phase　and　lead　to　dispersed　droplet　rupture　more　easily.