The high head ship lock often uses the second type of filling and emptying system to meet the water flow conditions in the lock chamber,but the engineering volume is large and the construction is complicated.Based on the topographic and geologic conditions of the lock site,we can heighten the sluice bottom’s elevation to cut down the engineering volume and simplify the construction.After taking energy-dissipating measures,we adopt the long-culvert and side-port filling and emptying system.By means of physical model,filling and emptying system of Panghai navigation and electricity junction can be optimized.Meanwhile,it is confirmed that taking measures including deepening the initial inundation depth of the lock chamber,arranging the energy-dissipating sills before the outlets of both sides of the lock chamber,optimizing the arrangement of the inlet and outlet,and arranging the lock head wall at the inlet can achieve the prospective effect.