The invention discloses an amphibious electro-tricycle. The amphibious electro-tricycle comprises a tricycle frame, a front fork, a front wheel, rear wheels, a rear axle, a direct-current motor, a motor controller, a saddle, a telescopic rod, an electric telescopic rod, telescopic rod fixing devices, a PVC pipe ship raft, a movable rudder, a propeller and a braking device. When traveling on the land, the amphibious electro-tricycle is an electro-tricycle body. When the amphibious electro-tricycle travels in water, the tricycle frame can be adjusted to rise or fall as needed until lifted on the water surface completely, the three tricycle wheels are not in the water; when steering is needed, the rudder can be out into the water, and a steering handle is used as a rudder; and amphibious switching is very smooth, advancing is conducted by the propeller, and the amphibious electro-tricycle is a small boat. In addition, the amphibious electro-tricycle is disassembled into the electro-tricycle body and the PVC ship raft which are independent easily, and thus high flexibility and practicability are achieved. An existing tricycle is converted into the amphibious electro-tricycle easily. The material cost is low, environmental protection and energy saving are achieved, and power consumption is low. The amphibious electro-tricycle is used and popularized in the aspects such as civil usage, recreation, fitness and flood self rescue easily.