This study analyzes the influence of the South Pacific Subtropical Dipole (SPSD) on the South Pacific Convergence Zone (SPCZ) and explores its dynamic processes by using SST data HadISST from the Hadley center and atmospheric reanalysis NCEP-NCAR data. Analysis shows that the SPSD is linearly independent of ENSO and shows strong phase locking peaks in summer (December January February). The location of the SPCZ precipitation is significantly affected by an SPSD event. The northeast pole (warmer SST) has a positive precipitation anomaly because of lower pressure and moisture convergence in this area during positive dipole event (referred to as positive event) years. However, the southwest pole (cooler SST) with its higher pressure is dominated by a divergence of moisture resulting in less precipitation. Therefore, the SPCZ precipitation zone moves to the north and the location of precipitation is opposite during a negative dipole event (referred to as negative event), which has less precipitation in northeast pole area and more precipitation in southwest pole area. Therefore, the SPCZ precipitation zone moves to the south. The results of this study provide more knowledge on the relationship between SPSD and SPCZ and help to better understand annual climate change and air-sea interaction in South Pacific.