Abstract: Characteristics of dry matter accumulation and distribution in three different rice cultivars, i.e. three-line hybrid rice Shanyou 63, two-line hybrid rice Liangyou 2186 and traditional rice IR 64, were studied in experimental farm of Fujian Agriculture and Forestry University, Fuzhou China in 2003. The results showed that the three rice cultivars performanced the same trends in the accumulation of dry matter, and no significant difference was found in all entries throughout all developmental stages. The amounts of accumulated dry matter in Shanyou 63, Liangyou 2186 and IR64 were 2074.13 g/m2, 1976.10 g/m2 and 1924.14 g/m2 at yellow mature stage, respectively, showing no significant different among them, then went down to 1926.38 g/m2, 1933.80 g/m2 and 1842.30 g/m2 at fully grain-maturing stage, accompanying with 7.12%, 2.63% and 4.25% consumed amounts of total dry matter accumulated at yellow maturing stage during full mature stage for Shanyou 63, Liangyou 2186 and IR64, which were considered to be related to higher respiration and natural plant aging. The community growth rate(CGR) of Shanyou 63 and IR64 peaked at full tilling stage, indicating 52.13 g/(m2?d) and 44.26 g/(m2?d) respectively, and Liangyou 2186 peaked at early heading stage with a value of 45.15 g/(m2?d). The CGR of the three rice cultivars changed in different developmental stage showed in the order: Early heading stage(Full heading stage)>Grain filling stage >Yellow maturing stage>Full tilling stage>Early tilling stage. Moreover, the rates of dry matter partitioning to the sink of grain in Shanyou 63, Liangyou 2186 and IR 64 were 47.94%, 41.14% and 45.69% respectively, of which about 46.87%, 24.98% and 34.41% dry matter stored in leaf, stem, shealth and root were translocated to grain sink in the process of grain filling. In view of translocation and partitioning coefficients of dry matter to grain, Shanyou 63（three-line hybrid rice）was much more advantageous over Liangyou 2186 (two-line hybrid rice) and IR 64 (traditional rice). In addition, the regression for dry matter accumulation over the rice growing and developing course showed that it could be fit by cubic equation better than that by Logistic equation, with R2 > 0.99 for any of the three rice cultivars.