A japonica rice cultivar 2645 was used and 2 treatments,including the application of all the wheat crop straw harvested and non wheat crop straw harvested were designed to study the effects of all wheat crop straw application on rice growth and redox substance in rice fields.The results showed that all wheat crop straw application increased spikelets per panicle and grain yield by 6.3%~6.9% and 2.4%~10.0% respectively,while decreased the content of oxygen in paddy water by 19.2%~68.4% at the effective tillering stage,the content of soil reducing substances and soil active reducing substance were increased by 6.2%~14.2% and 15.1%~86.5% respectively,the content of Fe2+ was increased by 9.7%~30.1%,the root activity of rice and Eh of soil were decreased by 3.6%~22.4% and 13.5%~21.1%,the tillers and LAI were decreased by 9.5% and 1.8%~4.3% respectively.It showed that all wheat crop straw application could increase paddy water oxygen consumptions at the early stage of rice growth,promote the accumulation of soil reducing substances,reduce the root activity of rice and Eh of soil,had certain effect on the rice group development at the early stage,but had no effect on rice grain yield.