In order to analyze the influence of different salinity and dripper flow on soil wetting body，the experiments of drip irrigation under the conditions of different salinity ( 0，1．7，3，4，5 g /L) and different dripper flow ( 7，9，11 mL/min) were carried out in this paper． The results show that the wetting front of drip irrigation with different emitter discharge and different brackish water salinity is similar in shape， which is 1 /4 ellipse，and the wetting front increases with time; the greater the emitter discharge，the quicker the horizontal wetting front advances; with the increase of salinity，the maximum advancing distance of the horizontal wetting front decreases first and then increases， and the maximum advancing distance of the vertical wetting front increases first and then decreases; the wetting front of soil with different salinity and dripper flow can be fitted with elliptical equation． On the basis of analyzing the influence of salinity，dropper flow and time on the parameters A and B，the dynamic change model of soil wetting front in drip irrigation under the coupling condition of salty water salinity and dripper flow is established． Then the experimental data are used to verify the results． The results show that the MAE and ＲMSE of the training set model are 0． 390 and 0． 549，respectively; the MAE and ＲMSE of the validation set model are 0． 438 and 0． 635，respectively． This indicates that the model has higher calculation accuracy and can be used for the dynamic simulation of drip irrigation soil wetting under the coupling of brackish water salinity and dripper flow．