During the Obama administration，the U.S. strategic posture in the Middle East could be conceptualized as “retrenchment plus some regional presence”. Such a strategic posture has to some degree been driven by U.S. global strategy adjustments，U.S. vital and enduring interests in the region，and the recent developments of the Middle East geopolitics. The so-called retrenchment includes withdrawals from Iraq and Afghanistan，avoiding military involvement on a large scale and giving up such conceptions as “Greater Middle East” and “democracy promotion”. However，the Obama administration still maintained some regional presence in the Middle East by means of forefront military presence，foreign assistance，and alliance network. At present，the U.S. could still use such a strategic posture to exert influence in the Middle East.