The invention discloses an emergency rescue boat with a dynamic sail, relating to the field of emergency rescue technical equipment for flood hazard and solving the problems that the traditional rescue boat adopting the stern-engined boat driving manner has high requirement for driving area and is easy to lose driving force in a water area with complex conditions. The emergency rescue boat comprises a boat body (10) and an upload part positioned above a water line of the boat body (10), wherein the upload part comprises an operation control box (2), an accelerator (13), an aircraft engine (6), a constant ratio speed reducer (7) and an air propeller (8); the power output by the aircraft engine (6) is controlled by the operation control box (2) and the accelerator (13) and is transmitted to the air propeller (8) through the constant ratio speed reducer (7); and the boat body (10) is driven by the reverse horizontal thrust force generated by the air propeller (8) to move. By adopting the air power system and arranging the air power system above the waterline, the emergency rescue boat can sail in any water area.