The utility model discloses an electronic speed controller for vehicles, which comprises a speed regulation signal generating device, a fixing device and a casing. The speed regulation signal generating device comprises a button, magnetic sheets, a magnetic induction device, a spring and a conducting wire, wherein, the magnetic sheets which are two are coaxially arranged in parallel with the same polarity opposite; when the button is pressed down, the magnetic sheets can be driven to do linear movements. The spring is connected with the magnetic sheets or with connecting devices between the magnetic sheets and the button, and the direction of the elastic force of the spring is opposite to the pressing direction of the button. The magnetic induction device is arranged in parallel between the two magnetic sheets, and the casing is installed on a vehicle through the fixing device. The device can be used for speed regulation through pressing the button. The device has the advantages of convenience and safety, being suitable for electric vehicles.