Abstract: The effects of straw returning on total carbon (TC), total nitrogen (TN), total phosphorus (TP) contents and their ecological stoichiometric ratios of soil waterstable aggregates in the early and late paddy field of Fuzhou plain were analyzed. The results showed that the TC, TN, TP contents and the TC∶TN ratio of aggregates were increased to different degrees in the early paddy, specially for the TC, TP contents and the TC∶TN ratio in 1-2 mm soil waterstable aggregates, which were increased by 42.3%, 22.2% and 29.1% (P<0.05), respectively, while the TC∶TP ratio was decreased to some extent and the TN∶TP ratio was not significantly changed after straw returning. In late rice paddy, the contents of TC and TP in 1-2 mm waterstable aggregates were significantly decreased (P<0.05). The TC∶TN ratio in aggregates was not significantly changed. The TC∶TP and TN∶TP ratios were increased in 1-2 mm soil waterstable aggregates, but decreased in the other sized aggregates in late paddy. In terms of the aggregate fractions, the soil TC, TN, and TP were mainly distributed in the waterstable macroaggregates (0.25-2 mm size), which were decreased as the decreasing size of aggregates in early and late paddy. Straw returning enhanced the soil nutrient contribution rates of waterstable macroaggregates but reduced the soil nutrient contribution rates of waterstable microaggregates (<0.25 mm size) in the late rice paddy. In general, the waterstable aggregates of 1-2 mm size were sensitive to straw returning in the early and late paddy. Straw returning had effects on the nutrient content of soil waterstable aggregates, while it had no significant effect on the nutrient stoichiometric ratio in the paddy field of Fuzhou.