Abstract: The variation of current with electrode pole distance and number during artificial seawater electrolysis is studied by using the graphite electrode device. The plastron state on the superhydrophobic surface replenished by the electrolysis device under different working voltages in the rectangular pipeline is observed, which proves the feasibility of this method. The results show that:There is a linear relationship between the voltage and the current are linear in the working process of the electrolyzer. Under a constant voltage, the current increases with the electrodes number and decreases with the pole distance. Study on the electrolysis efficiency shows that increasing the electrodes number is advantageous for increasing the current, but decreases the electrolysis efficiency. It is observed that the superhydrophobic surface plastron disappears under the scouring of turbulent flow. When the electrolyzer is operated at a low voltage, the gas production is not enough and the gas supply device works intermittently. The gas-liquid interface recovers partly on the superhydrophobic surface; When the voltage is increased, the gas production increases and a more obvious specular phenomenon can be observed, which proves the feasibility of the superhydrophobic electrolytic gas replenishment.