The intraseasonal oscillation is a strong signal of the tropical atmospheric activilies and also a common phenomenon in the tropical ocean.This article depicts firstly the progresses in the research on the tropical intraseasonal oscillations,such as the studies on the observation and mechanism of the tropical atmospheric intraseasonal oscillations and on the tropical oceanic intraseasonal oscillations.And then the effects of air-sea interaction and multi-scale interaction upon the intraseasonal oscillations are discussed briefly.Prospects of further studies on the tropical intraseasonal oscillations are proposed based on those summaries.