The invention relates to the technical field of electro-tricycle power sources, and discloses a multi-power-source-shared electric tricycle which comprises a tricycle seat box body, and a power supply cooling mechanism and a multi-power-source switching mechanism are arranged in the tricycle seat box body. The power supply cooling mechanism comprises a round hole, a double-head motor, a first motor shaft, a second motor shaft, a blowing fan blade, an exhaust fan blade, a rotating rod, a generator and a battery box body. Round holes are formed in the left end and the right end of the front side of the tricycle seat box body. As a connecting shell, a square hole and a waterproof breathable film are arranged in a battery box body, three batteries can be stacked in the battery box body, the immersion liquid is arranged in the connecting shell, and the waterproof breathable film can be directly attached to the battery body, so that the batteries are cooled, the immersion liquid is not conductive, and even if the immersion liquid leaks, the battery is only soaked in the liquid, so that the use safety of the battery is improved.