In order to provide scientific basis for scientific water management of rice andsoil improvement，the effects of integrated rice-crayfish model on rice yield and soil reducing substances under optimized water management were explored. The water optimal management treatment mainly based on the measures of twice heavy sunning in the late tillering stage and mature stage of rice and the water conventional management treatment mainly based on the measures of twice light sunning in the late tillering stage and mature stage of rice were setup，respectively，and the relevant research was carried out in Qianjiangcity，Hubeiprovince，using the field positioning test. The results showed that the average yield of optimized water management was8.5%，higher than that of conventional management under the condition of directseeding ofrice， and the average yield of optimized water management was9.4%，higher than that of conventional management under thecondition of mechanical transplanting ofrice，both of which reached a significant level for the gleyed paddy fields. The yield increase effect of optimal water management on high quality indica rice was better than that on high quality japonica rice.Compared with conventionalmanagement，the positive effects of water optimal management on effective panicles and grains per panicle weregreater than seed setting rate and 1000 grain weight. At the late tillering stage ofrice，compared with conventionalmanagement，the content of ferrous iron in 0-10 cm soil layer was decreased by 40.8%-41.8%，and the total amount of reducing substances in 0-20 cm soil layer was decreased by 45.1%-46.4%. Compared with the late tilleringstage，the total amount of ferrous and reducing substances in the 0-20 cm soil layer after rice harvest showed a decreasing trend. Inconclusion，water optimization management measures such as gleying rice field under integrated rice-crayfishmode，twice sun drying at the late tillering stage and mature stage could significantly increase rice yield and alleviate the degree of soil gleization.