Sediments from Liangzi Lake were collected and analyzed to study the spatial distribution and pollution risk evaluation of the nutrients. The results show that: the content range of TN,TP,NH_3-N,NO_3-N,NO_2-N of the surface sediments (0~ 5 cm) in Liangzi Lake was respectively 598 ~ 1372 mg·kg~(-1),323~ 804 mg·kg~(-1),60.7~ 142 mg·kg~(-1),4.16~ 31.6 mg·kg~(-1) and 0.001~ 2.29 mg·kg~(-1) . Nutrients content was higher in the western lake than that in the southeastern lake,while it was very low in the center of the lake. Human activity and pollutant input strength had a great influence on the spatial distribution of nutrients of the surface sediments in Liangzi Lake. The content of NH_3-N and NO_3-N of the sediments in Liangzi Lake increased from the deep layer to the shallow layer,and reached the peak at the depth of 2 ~ 3 cm,which implied that the scale of modern industry and agriculture in Liangzi Lake Basin reached an unprecedented scale in this depositional period. NH_3-N content of the sediments was higher at the depth of 5~ 10 cm than other layers. And the NH_3-N content of all the sediments was below 150 mg·kg~(-1) because of the preferentially absorption by aquatic plants. The distribution characteristic of TN and TP of the sediments was similar in the vertical direction,which revealed that the enrichment of TN and TP in the sediments may come from the homologous pollutants. Developed aquaculture in Liangzi Lake Basin was one of the reasons leading to the accumulation of TN and TP in the sediment. Besides,phosphorus in sediments coming from the crustal activity caused a greater fluctuation of TP content than TN in the vertical direction. The variation range of the standard index of TN and TP of the sediments in Liangzi Lake were 1.09~ 2.49 and 0.54~ 1.34,suggesting that the environmental quality in Liangzi Lake Basin was more seriously influenced by nitrogen. The content of TN and TP of the sediments in Liangzi Lake was ranging respectively 598~ 1372 mg·kg~(-1) and 323 ~ 804 mg·kg~(-1),which had been beyond their threshold range in eastern shallow lakes in China,posing a threat to the ecosystem of the lake.
