姜維由于宦官黃皓的讒言,受到后主猜忌,郄正出主意要姜維沓中屯田避禍;鄧艾伐蜀,下江油,郄正保舉諸葛瞻迎敵鄧艾;司馬昭遷后主于洛陽,郄正以秘書令的身份相隨,并且向后主獻計,要后主哭訴請求還鄉(xiāng)