Abstract: Total ozone during the period of Antarctic ozone hole of 1993 at Zhongzhan station in Antarctica is extracted from TOVS data of NOAA-12 by using an improved statistical regression scheme. The present results, NOAA’s ozone retrievals and surface Brewer observations were compared with each other, it is found that although the three kinds of data are in good agreement for the remarkable decrease of ozone amounts, corresponding to Brewer observations, both the present results and NOAA’s retrieval products have larger errors with 29 and 34 Dobsons of RMS, respectively. Obviously, the former is superior to the latter. Additionally, the characteristics of the two retrieval error were discussed.