Propulsion system for amphibious chariot

The utility model discloses a propelling system for an amphibious chariot. The propelling system comprises a water inlet cavity, a transmission device and a propeller. The water inlet cavity comprises a cavity shell, a fixing ring base and a rectifying screen. The cavity shell is installed on the amphibious chariot through the fixing ring base, and the rectifying screen is of a concave structure which is concave towards the interior of the cavity shell. And the propeller is communicated with the cavity shell. A transmission shaft of the transmission device penetrates through the cavity shell and then is connected with the propeller. According to the system, the design that the water inlet cavity with water entering from the lower portion is combined with the sunken rectifying screen is adopted, entering of impurities in a water body is reduced, the trepanning area is greatly increased, and the water inlet amount is effectively guaranteed. And meanwhile, the spiral pressurizing flow channel in the propeller ca