The invention provides an aircraft and a direction control device thereof. The direction control device comprises a mounting support, a left pedal connecting rod, a right pedal connecting rod, a left driver's left foot operating
assembly, a left driver's right foot operating
assembly, a right driver's left foot operating
assembly, a right driver's right foot operating assembly, a
rudder, a left pedal coordination rod, a right pedal coordination rod, a coordination
rocker arm and an output rod; the second end of the left pedal coordination rod is hinged to the first end of the coordination
rocker arm, and the second end of the right pedal coordination rod is hinged to the second end of the coordination
rocker arm; the middle part of the coordination rocker arm is provided with a rocker arm middle hinge shaft extending in the vertical direction, and the coordination rocker arm can swing around the rocker arm middle hinge shaft; the two ends of the output rod are respectively hinged to the coordination rocker arm and the
rudder. The direction control device can realize the ground and water surface direction control of the amphibious aircraft at the same time, ensure the independence of the ground and water surface control, and has a simple structure, safety and reliability, and saves cost and weight.