The utility model relates to a sheet -pile wharf breastwork construction technical field specifically indicates a supporting structure of be used for sheet -pile wharf breastwork to pour template. Include the cantilever on one side of the steel sheet pile upstream face that is located who fixes at the upright support on the every H template stake and on fixing the support of standing vertically, upright support include the pole setting of lower extreme welding in the stake of H template, the upper end welding of pole setting have the main beam, main beam one end welding in the upper end of pole setting, the other end extends to steel sheet pile upstream face one side along the horizontal direction and forms the structure of encorbelmenting, the vertical jib of arranging is installed to the one end of encorbelmenting of main beam, cantilever hang on the main beam through the jib. The utility model discloses simple structure, simple to operate has avoided the anticorrosive coating that destroys the steel sheet pile, has simplified construction process, has very big spreading value.