Abstract: In this paper, an analysis of the correlation between El Nino/anti-E1 Nion and the variation of stratosphere 50hPa height anomaly field has been made for the last 30 years. The results show that, in the winter (November to next January) before El Nino year, the negative height departure is found near the high latitude area, in the mid- latitude except Northern America, which has the positive height departure, and the vast area south of 30°N is controlled by negative height departure at 50hPa. But it is converse before anti-El Nino year. Moreover, the variation of 50hPa height anomaly field during the winter is greater than itself in other months and that for 500hPa. Thus, the variation of 50hPa height anomaly field in winter time is obviously indicative of the occurring of E1 Nino/anti-E1 Nino.