Abstract: The reconstruction and extension project of Fuliutan shiplock is a main part of the navigation construction project of the Qujiang River in Guang’an City,which is quite significant to the economic and social development of the east Sichuang Province.Due to the high standards of the new lock,a model test should be carried out for the optimal design of the filling and emptying system.Based on the preliminary design of the filling and emptying system,a 1∶25 physical model has been set up for studying its characteristics.The results indicate that the overall layout and the design of the bottom longitudinal culvert system with side ports and open ditches are reasonable,and the hydraulic characteristics under recommended valve opening mode have all satisfied the requirements of the design and related codes.