In this paper, 3D simulation model for the river closure is established by making use of virtual reality and 3dsmax technique. With the analysis of the dynamic hydraulic characteristics at the closure-gap, a VR-based 3D dynamic visual-simulation of method for the complex process of river closure is presented. In this visual epresentation, comparison among different schemes of river closure is achieved easily. Therefore, a powerful visual tool for aiding river closure design and management can be provided.