Abstract: By using oppositions of planets data provided and apparent right ascension data calculated by general astronomy software SKYMap Pro Version 8,the relationship between ENSO and the relative positions of planets have been analyzed.It has been found that There is a distinct link between the two,and the main results are that:it is beneficial to the EL-Nino event occurring in the current years that oppositions of the three planets(Mars,Jupiter,Saturn) happened in March,and the events associated Mars or Jupiter opposition lasted for more times than Saturn.It is beneficial to the EL-Nino event occurring in the following year that oppositions of Mars and Jupiter happened in August,but is not obvious for Saturn.It is likely that the La-Nina events will occurr in the current year when oppositions of Mars and Jupiter happen in September,and when Saturn opposition happens in September,LA-Nina tends to occur in the previous year and EL-Nino in the following years.Non contingency test for the relationship between ENSO and the apparent right ascension of planets shows that only Jupiter and Saturn have correlative areas for apparent right ascension of single planet,while others have not.Most of the correlative areas do not coincide.Probability distribution of Nino4's surface sea temperature anomaly >0 presents asymmetric structure for apparent right ascension of Jupiter.There are two odd symmetry in the Jupiter's correlative areas and 3 even symmetry in the Saturn's correlative areas,and the difference between each are 60 ?,presenting a hexagonal structure in space constitutes.