Abstract: Allelopathy of extracts from different kinds of straw and green manure was examined to provide the reference for straw and green manure application in the rice field. By using the incubation experiment, the effects of extracts of rice straw, rape straw, wheat straw, Chinese milk and Chinese milk mixed with rape on rice germination and seedling biomass were studied. The results showed that rice straw, rape straw, wheat straw, Chinese milk and Chinese milk mixed with rape had no effect on the germination rate of rice, but could delay the progress of germination. Different extracts at all the concentrations significantly promoted the seedling fresh weight. Extracts of rice straw, rape straw, wheat straw, Chinese milk and Chinese milk mixed with rape at different concentrations increased the seedling fresh weight as high as 16.84%, 6.72%, 17.50%, 16.13%, 25.84%, respectively. The sensitive index of rice straw, rape straw, wheat straw, Chinese milk, Chinese milk mixed with rape straw were 4.70%, 4.10%, 7.96%, 0.94%, 5.20%, respectively. All kinds of straw and green manure showed favorable allelopathic on rice, Chinese milk mixed with rape straw displayed better than Chinese milk vetch or rape alone.