Based on the indoor flume experiment and theoretical analysis,a two-layer model(i. e.the vegetated layer and the upper non-vegetated layer) is proposed to predict the vertical distribution of longitudinal velocity in the flow with submerged vegetation. For the upper non-vegetated layer,a modified mixing length theory combined with the concept of the new vegetation boundary layer was adopted,and an analytical model was presented to predict the vertical velocity distribution in this region. For the vegetated layer,the analytical solution was presented by fitting the experimental data.Finally,by analyzing the experimental results,the two-layer model is in good agreement with the results.