An　automatic　transmission　(AT)　shift　control　model　was　completed　by　commercial　code　Simulation　X　based　on　AT　shift　control　system　mechanism.　The　AT　shift　process　under　condition　of　varied　machining　deviation　was　analysed　by　virtual　calibration　method　based　on　this　AT　shift　model.　The　results　show　that　the　machining　deviation　of　AT　shifting　control　component　causes　effect　on　the　shift　quality,　especially　affecting　the　shift　impact　during　the　shift　process.　The　machining　deviation　is　larger,　accordingly　the　calibrated　parameters　such　as　the　hydraulic　pressure　gradient　and　the　control　time　increase.　It　is　helpful　to　improve　the　shift　quality　to　set　the　suitable　calibration　parameters　of　clutch　shift　according　to　different　machining　deviation.　©　Published　under　licence　by　IOP　Publishing　Ltd.