This paper introduced the Ransimat lab test, studied the oxidation stability conditions of deordorization process control. With the studies of deordorization steam flow, feed rate, feed temperature and three factor of orthogonal tests, the best oxidation stability technology conditions were determined.The orthogonal tests results indicated that the longest AOM technology conditions in production line were as follows that deordorization water steam flow 70 kPa, enter the oil discharge 24 m3/h, and deordorization temperature 252 ℃, under which the AOM could be more than 3.17 h.