Hydraulic ship lift is a kind of navigation structure for ships to cross a high dam,the validity and rapidity of its electrical control system is very important.Taking the water driving system and ship-chamber system of the project of Jianhong ship lift as an example,we apply a set of program flow for the combined water filling and discharging valves and tumble gates of the ship chamber to meet the needs of auto filling or discharging water for the tank of the ship-chamber.This method has been successfully validated in Jinghong hydraulic ship lift.