The invention discloses a wind-and-solar energy lawn mower. The lawn mower includes a body, a solar energy controller, a wind energy electric generator, an inverter, a small idler wheel, a control panel, a hydraulic cylinder and an electric motor, the lower side of the body is provided with a large idler wheel, the right side of the large idler wheel is provided with the small idler wheel, the upper left side of the body is provided with a solar cell panel, the lower side of the solar cell panel is provided with the solar energy controller, the right side of the solar energy controller is provided with the wind energy electric generator, and the lower side of the wind energy electric generator is provided with a storage battery; the inverter is connected with the electric motor through power transmission lines, the lower side of the electric motor is provided with a lawn mowing device, the upper side of the electric motor is provided with a piston rod, the upper side of the body is provided with fan blades, the lower sides of the fan blades are provided with a main rod, and the upper right side of the body is provided with the control panel. According to the lawn mower, by installing an adjusting rod on the upper side of the wind energy electric generator, the wind-receiving height of the fan blades can be adjusted, and therefore the wind receiving ability of the fan blades andthe electric energy production of wind power generation are improved.