Abstract: The drought-resistance research of the plant has important significance to the agricultural production and the ecological building. The drought environmental condition will cause the plant body to have a series of physiological and biochemical responses, this article summarized the influence of drought to plant's external features characteristic, the osmotic regulation, the plant endogenous hormones, the photosynthesis and the respiration,which will provide theory basis for the next deeper research on the drought resistance of the plant.