The invention publishes an electric vehicle speed-regulating device and a control method thereof. The device is characterized in that a pressure sensor is connected with an electric vehicle controller the control unit of which is formed by using a singlechip as a core; the pressure sensor is horizontally installed between the spongy cushion and the protecting surface of an electric vehicle driving seat, and the output end thereof is connected with the input end of the control unit in the electric vehicle controller. The control method thereof is characterized in that whether a driver sits on the driving seat or not is detected through the pressure sensor; when an electric vehicle is pushed, a rotating handle is rotated to regulate the speed within a low speed range; in the normal driving process of the electric vehicle, when the electric vehicle is braked and stopped, the body leaves the driving seat of the electric vehicle, and the rotating handle is not loosened; and when the rotating handle is loosened, the speed of the electric vehicle is still zero. The invention improves the braking safety of the electric vehicle when encountering an emergency in driving and overcomes the potential safety hazard brought by the speed of the electric vehicle exceeding the walking speed of a person when the person pushes the electric vehicle to walk with speed by rotating the rotating handle.