Anode stream recirculation system for a fuel cell

An anode stream recirculation system for a fuel cell comprising an anode gas supply (60), a switch (62) and a regulating device (64) to properly control the amount of anode gas supply; a sensor (66) connected with the switch to detect the pressure of the anode gas discharged from the fuel cell (80) and to control the open/close of the switch; and a humidifier (70) to adjust the humidity of the anode gas discharged from the fuel cell. The discharged anode gas after the adjustment of the humidity thereof is redirected to anode gas input of the fuel cell to form an anode gas recirculation.