The invention discloses a motor tricycle which comprises a frame rear axle, a frame installed on the frame rear axle, a driving motor, a tricycle engine and a gearbox. The driving motor and the tricycle engine are installed on the frame. The output end of the driving motor is fixedly provided with a first inner shaft. The first inner shaft is sleeved with a first shaft sleeve. The first inner shaft can drive the first shaft sleeve to rotate forwards through forward rotation, and the first shaft sleeve cannot drive the first inner shaft to rotate forwards through forward rotation. A first transmission gear is fixedly arranged at the end of the first shaft sleeve. The first transmission gear drives the gearbox. A second inner shaft is fixedly arranged at the output end of the tricycle engine. The second inner shaft is sleeved with the second shaft sleeve. The second inner shaft can drive the second shaft sleeve to rotate forwards through forward rotation, and the second shaft sleeve cannot drive the second inner shaft to rotate forwards through forward rotation. A second transmission gear is fixedly arranged at the end of the second shaft sleeve and drives the gearbox. The gearbox drives the frame rear axle through a transmission shaft. Accordingly, driving modes can be flexibly selected according to different road conditions and using demands, and green transport is achieved.