In order to study the interception effect and hydrodynamic mechanism of vegetation filter strips (VFS) during runoff and sediment yield progress on slope surface

a simulated vegetation filter belt was set up on the inner soil trough

and the muddy water erosion tests were carried out. After getting the runoff and sediment yield and related hydrodynamic parameters under the situation of with or without vegetative filter strip through the tests

the vegetation filter intercepting effect of runoff and sediment was quantitatively analyzed and the relationship between sediment production rate and hydrodynamic parameters was explored. The results showed that VFS could effectively intercept runoff and sediments during the tests

and the interception rate was better under smaller flow. When the flow was 200 L/h

the interception rate was 33.2% for runoff and 96.9% for sediments. During the scouring process

the sediment yield rate had significant correlation with flow shear stress and flow power under the situation of with or without VFS

which were positive exponential function relationships (R2=0.67

R2=0.83) with flow shear stress and power function relationships (R2=0.70

R2=0.87) with flow power

respectively. Using a nonlinear regression equation Rs=1.184×10-6τ-4.114ω3.839（R2=0.73）with flow force and flow power to predict the sediment yield rate could get better effect.