Abstract:North China is one of the major grain producing areas in China, the calculation of the soil CH4 uptake and emission in this area play important role in estimating accurately China′s emission amount of agricultural greenhouse gas and establishing reasonably agricultural mitigation and adaptation measures. In this study, the dynamic change and diurnal variation of soil CH4 flux in five tillage models during different growth periods in North China were studied using the Static-Chamber method and the Gas Chromatography(GC). The results showed that, CH4 flux had obvious dynamic change under different tillage models in different growth periods. All treatments were the sink of CH4 absorption. Comparison of CH4 uptake among different treatments indicated that CH4 uptake flux under AC≈PC > PH≈PR>PS>PZ. CH4 uptake flux also had obvious diurnal variation, higher in the daytime and lower in night. Comparison of CH4 uptake flux among different treatments showed that AC > PC > PZ. As a result, CH4 absorption flux was higher in the treatment of straw absence & conventional tillage, but this model was not conducive to protect plough layer. In comparison, harrow and rotary were both conservation tillage methods to keep a better ability for both soil moisture and fertilizers, and less disturbance to the soil. Furthermore, CH4 uptake were only decreased by 5.35%,6.31%, respectively, in the harrow and rotary conservation tillage methods than that in straw absence & conventional tillage method, and favorite to agricultural mitigation emissions. This investigation proved that harrow and rotary conservation tillage systems were ideal to benefits environmental and soil plough layer.