A pot experiment was carried out using two types of paddy soils (yellow and red paddy soil) different in soil organic matter and pH, and 9 rice cultivars (three hybrid, three indica and three japonica) for exploration of effects of rice cultivars and arsenic (As) pollution on contents of DOC (dissolved organic carbon) and DON (dissolved organic nitrogen) in the soils and interactions among the three factors, rice cultivar, As pollution and soil type. Results show that rice cultivars displayed a significant impact on content of DOC and DON in the soils, and followed a decreasing order of hybrid rice (41.09±0.92 mg kg^-1) > indica rice (38.10 ±1.53 mg kg^-1) > japonica rice (37.74 ±1.37 mg kg^-1) in terms of DOC, and of japonica rice (2.94±0.40 mg kg^-1) > hybrid rice (2.61±0.42 mg kg^-1) > indica rice (1.45±0.17 mg kg^-1) in terms of DON. As pollution decreased DOC and DON contents in the soils, but the effect varied with the rice cultivar. Compared with CK, As pollution decreased DOC by 14.4% and 11.1% and DON by 65.0% and 44.7%, in yellow and red paddy soils, respectively, and the least decline of DOC was in soils cultivated with hybrid rice, while that of DON was in the soils cultivated with indica rice. The average contents of DOC and DON were 22.4% and 45.8% higher, respectively, in the yellow paddy soils than in the red paddy soils without As pollution, which was attributed mainly to the higher organic matter content and pH in the yellow paddy soils. Rice species, As pollution and soil type differed in their effects on soil DOC and DON, and was responsible for 7.7%, 15.5%, and 27.6% of the variation of DOC, while 14.7%, 24.2%, and 2.0% of DON, respectively.