A total of four 10×10 m2 standard sampling plots in Shaoshan forest were chosen, and litterfall, litterfall leaching and throughfall were collected respectively for this study. The seasonal dynamics of litterfall and its effect on acid deposition, as well as the characteristics of litterfall leaching and throughfall, were studied. The research results showed that: (1) The quantity of litterfall in autumn is larger than that of other seasons in Shaoshan forest, and the quantity of litterfall increases along with the altitude increases; (2) Concentration of each base cation in other seasons is in the order of Ca2+ >K+ >NH+4 >Mg2+ >Na+ besides K+ >Ca2+ in summer, which is consistent with the trend in throughfall; (3)There is a remarkable pertinence between the concentrations of base cations in litterfall leaching and in throughfall except for Ca2+, yet K+ concentration reached the tarnal salient pertinence level, which approves that the K+ reverting to soil by litterfall comes from forest canopy leaching mostly in Shaoshan forest; (4) Besides some individual spots, the concentration summation of all base cations in litterfall leaching is higher than that in thoughfall in various degrees, and the increase range in autumn is the biggest followed by that in winter, which is consistent with the quantity change of litterfall; (5) The change scope of pH value in throughfall is 4.58-7.13, the minimum value appears in winter, and the maximum appears in summer, while the change scope of pH value in litterfall leaching is 5.02-6.69,which is higher than the average pH of surface soil layer(pH 5.0), but the minimum value appears in spring, and the maximum appears in autumn; (6) The pH of litterfall leaching at each study plot increases in winter, about 0.06-1.35 higher than throughfall pH, but decreases in other seasons(barring plot C in autumn),which indicates that litterfall in Shaoshan forest is a fine acid-buffering system in winter, however, because the base cations leaching from litterfall is not enough to counteract the organic acid produced by litterfall decomposition in spring, summer and autumn, so the pH of litterfall leaching is going down in these seasons.