Soil preferential flow will lead to the rapid movement of water and fertilizer in the field and affect the efficiency of water absorption and fertilizer demand of crops.Taking the typical sugarcane fields in Guangxi province as the research objects，the methods of the dye tracer technique and indoor soil column infiltration simulation experiment were combined，and the movement of soil preferential flow in sugarcane field under different tillage methods was simulated and analyzed by using morphological analysis and computational fluid dynamics analysis methods in order to quantitatively explore the movement process of soil preferential flow in farmland.The results showed that:1)The differentiation degree of the staining morphology of soil vertical profile in no tillage sugarcane field was higher than that in smash-ridging tillage sugarcane field，the motion morphology of wetting front fluctuated greatly，the water infiltration capacity was stronger，the phenomenon of preferential flow was significant，and the distribution was relatively wider.2)Under the same external water supply conditions，the initial outflow time of soil column in no tillage sugarcane field(6 min 1 s)was earlier than that in ridge tillage sugarcane field(8 min 20 s)，and its mass flow rate and preferential flow rate were 1.09 and 1.36 times higher than those in smash-ridging tillage sugarcane field(P<0.05).3)In the same time，the pressure value of the surface layer(0～ 10 cm)of no tillage sugarcane field was relatively large.When the water flow reached the steady state，its average value was 1.20 times that of smash-ridging tillage sugarcane field.The preferential flow of no tillage sugarcane field was mainly vertical movement and accompanied by lateral movement，while the smash-ridging tillage sugarcane field showed uniform downward infiltration of water as a whole.