In　this　paper,　a　micro　jet　generator　that　generates　multidirectional　jets　in　a　closed　cavity　is　proposed.　And　the　design,　simulation,　experimental　verification　and　manufacture　are　given.　The　airflow　circulation　mechanism　in　jet　generator　is　explained　by　the　method　of　combination　of　a　three-dimensional　transient　numerical　calculation　based　on　fluid-solid　coupling　and　constructing　PIV　experiments.　The　calculation　and　experiment　show:　(1)　Two　pairs　of　symmetrical　jets　which　are　complete　stable　and　almost　identical　in　orthogonal　direction　are　generated　in　four　jet　chambers.　The　average　velocity　v　of　jet　at　the　nozzle　orifice　5.52　m/　s.　The　maximum　relative　error　is　less　than　0.8%.　(2)　The　measured　maximum　excitation　voltage　of　the　micro　jet　generator　is　30V.　The　optimum　working　frequency　is　10kHz.　The　micro　jet　generator　can　be　used　in　multi-axis　inertial　jet　sensors,　microfluidic　control　chips　and　other　fields.　©　2018　IEEE.