Abstract: Based on oceanic temperature data of 1955-2001 in the tropical Pacific,the changes of the west Pacific warm pool oceanic temperature anomalous signal pathway are analyzed and discussed in the paper.The pathway that influences anomalous signal of sub surface oceanic temperature in the west Pacific warm pool region is revealed.The analysis indicates that there is close relation between change of sub surface posit ive and negative oceanic temperature anomalous signal in the west Pacific warm pool region and the anomalous signal westward propagation in the north equatorial current.The signal in the north equator current propagated from the equator middle east Pacific toward the west Pacific warm pool region along the ther mocline,the cool and warm signal in the west Pacific propagated toward the equator middle east Pacific along the thermocline, and they have formed cyclone circulat ion pathway of tropical oceanic anomalous signal on thermocline curved surface.The westward propagation of the sub surface oceanic temperature anomalous signal in the north equatorial current is the important mechanism to lead to the warm pool region and the west Pacific and is a key factor influencing the El N ino and La Nina events.