Base on the tropic cyclone data from 1949 to 2003, the spatial-temporal distribution features of influencing and landing tropic cyclone(TC) numbers in Hainan Province, temporal distribution of the first and the last influencing TC to Hainan are analyzed. Furthermore, the relationship between ENSO and the influencing TC to Hainan, and the reasons that no TC influences Hainan in 2004 are investigated. The main results are as follows. (1) Correlation between ENSO and activity of influencing TC to Hainan is significant. (2) Influencing and landing TC to Hainan are getting less and the first influencing TC to Hainan is getting later in warm SSTa event, and vice versa. (3) Correlation between ENSO and the last influencing TC to Hainan is not significant.