How to reduce the scour pit depth is an important issue in bridge design and maintenance.To further explore the influence of the installation position of the lattice promoting sedimentation on the sedimentation and restoration effect of local scour pits around piles and piers，this paper investigates the change characteristics of sedimentation and restoration efficiency with the installation position and aperture size of the lattice promoting sedimentation by flume test.The results show that the sedimentation and restoration efficiency is less affected by the intensity of incoming flow and more affected by the relative installation position of the lattice.To improve the stability and sedimentation and restoration effect of the lattice promoting sedimentation，it is necessary to install the lattice promoting sedimentation as high as possible below the trough of the sand wave，so as to obtain the maximum sedimentation capacity and increase the sedimentation depth.The effect of the installation position of the lattice on the sedimentation and restoration effect of scour pits is significant with the decreasing aperture size of the lattice.Finally，this paper proposes a formula for calculating the final sedimentation depth under the protection of the lattice promoting sedimentation，which can provide a reference for the future engineering application of the lattice promoting sedimentation.