In the JTS 190-2018 Design Code for Maritime Structures and Services in Shipyard，the stability of sheet piled dock wall should be checked in accordance with the relevant provisions of sheet piled wharf in JTS 167-2018 Design Code for Wharf Structures. However，the water pressure for piled wharf is smaller than that of the dock wall. Thus，the rationality of directly using partial factor format and factor values for the stability of sheet piled wharf should be verified. Through the calibration of reliability for the stability of sheet piled dock wall，which is designed by the old code JTJ 252-1987 Code for Design of Dry Dock（Hydraulic Structures） ，the target reliability index is determined，and reliability indexes for wall designed by current practice are determined. The results show that the target reliability index of stability for sheet piled dock wall should be 4.0，while the average value of reliability index for wall designed by the new code is slightly larger than 4.0，which validates the rationality of factor values utilized in the current code.