Abstract: Hydraulic flashboard permeable spur dike is a new kind of spur dike. In this paper, we made movable bed model test for three kinds of spur dike group, the hydraulic flashboard permeable spur dike, well-column-pile permeable spur dike and entity spur dike. First, we measured the flow velocities at transverse section 5cm in front and back of every spur dikes in each dike groups and calculated the average flow velocity. Then, through the comparison of the average flow velocity in front and back of the spur dike, we analyzed the differences of reducing average flow velocity by the three kinds of spur dike group and the mechanism of the differences. The results showed that: compared with entity spur dike group, the flow velocity reduction efficiency of hydraulic flashboard permeable spur dike and well-column-pile permeable spur dike increase 34% and 23% and the flow velocity decrement increase 107% and 84%, respectively. Because the reduction of flow velocity also affects local scour of spur dike and the siltation behind dykes, we measured topography near the spur dikes and drew topographic map of the three spur dikes through surfer 8.0. The results show that the local scour and siltation of entity spur dike group is most serious, the hydraulic flashboard permeable spur dike group is the most slight, and the well-column-pile permeable spur dike group falls between them.