The seasonal meteorological dry and wet evolution of Guangxi,which referred to frequency,range, intensity,temporal spatial variation and future trend adopted by precipitation anomaly percentage,DEOF and R/S methods,were analyzed in this paper over the past 65 years,based on APHRODITE and TRMM rainfall data. The results showed that: (1) Annual dry /wet frequency decreased gradually from southeast to northwest of Guangxi, however,seasonal dry /wet frequency presented significant differences in spatial distribution within a year. The affected range and intensity of dry /wet varied alternately and fluctuated both in annual and seasonal scales,but their variation were significant differences among these time scales. (2) The dry-wet temporal evolution emerged alternating strong and weak oscillations in all annual and seasonal scales,and the spatial variation declared different patterns,such as: the reverse type of southeast-northwest in the yearly scale and in winter,the uniformity type of whole region in spring,the opposite type of north and south in summer,and the reverse type of east and west in autumn. (3) The future rainfall in Guangxi would increase significantly in summer and in the annual scale,with slight decrease in spring,autumn and winter. This research would be an important scientific basis for further wet and dry evolution warning and dry-wet disaster prevention in Guangxi.