This paper deals with the study on the dynamic changes of water content in upland red soil derived from Quaternary red clay in Jiangxi Province from 1990-1993.Results showed that the physical properties of upper layer of the upland red soil had apparent changes compared with those of the uncultivated red soil. For example, the soil bulk density and soil resistance were decreased, but the soil porosity was increased. The physical properties of that soil in the lower layer were still similar to those of uncultivated soil, but the water-releasing ability and specific water capacity were declined remarkably. Results also indicated that the water storage of upland red soil in different periods of a year was higher than that of uncultivated red soil. As a result, the delay of wilting point in surface layer appeared and the draught depth in soil was shallower in upland red soil in comparison with those in the uncultivated red soil. This behavior shoved that the increase in the acceptance of rainfall and soil water content were beneficial to upland red soil after leveling reclamation of uncultivated red soil. According to the comparison of the water storage measured in field condition with the calculated data of water-storage volumetric capacity, the 0-300cm layer of upland red soil was basically filled with water during the first six months of a year. pore space in water-storage volumetric capacity of 0-100cm layer of upland red soil could increase the acceptance of rainfall during the second half of a year, but in that time richer water storage was still maintained beneth 100cm depth of that soil.Consequently, how to use the water storage in the deep soil layer would be of important significance for alleviation of the draught harm of hilly region in summer and autumn.