The　design,　sensitive　mechanism　and　numerical　simulation　of　an　fluidic　gyroscope　based　on　MEMS　with　an　open　airflow　channel　are　reported.　The　3D　transient　numerical　analysis　based　on　the　fluid-structure　interaction　was　used　to　calculate　the　movement　of　airflow　in　the　sensitive　element.　Calculations　and　results　indicated　that:　①With　the　drive　of　piezoelectric　pump,　the　airflow　flows　into　the　open　airflow　channel　through　two　inlets　and　then　gather　together.　Then,　the　airflow　flows　through　the　nozzle　and　forms　the　sensitive　jet　flow　in　the　fluidic　sensing　cavity,　thus　there　is　a　directional　flow　between　inlets　and　outlet.　②Sensitive　jet　flow　deflects　because　of　the　Coriolis　Force　and　exchanges　heat　with　the　hotwires　which　forms　the　Wheatstone　bridge.　Therefore,　Wheatstone　bridge　outputs　an　unbalanced　voltage　proportional　to　the　applied　angular　velocity.　③The　sensitivity　of　mentioned　gyroscope　is　SFZ=2.0　μV/°/s,　and　simultaneously,　the　nonlinearity　is　better　than　0.5%.　©　2017,　The　Editorial　Office　of　Chinese　Journal　of　Sensors　and　Actuators.　All　right　reserved.