Controller for electric vehicle

In order to make an electric vehicle used normally when a rolling handle, a brake lever and/or a Hall element of an electric motor are damaged, the invention provides a controller for the electric vehicle. The controller comprises a central control unit, a driving circuit connected with a motor control output end of the central control unit for controlling a brushless motor, a rolling handle control input circuit connected with a rotating speed control input end of the central control unit, and a cruise switch connected with a cruise control input end of the central control unit, wherein the rolling handle control input circuit is connected with the rolling handle for controlling the rotating speed of the electric motor; when the central control unit detects that voltage at the rolling handle control input end is not within a preset range, the central control unit judges out that the rolling handle control input circuit or the rolling handle fails and then enters into a cruise control mode, namely, only when the cruise switch is shut off, the central control unit controls the brushless motor to rotate at a preset rotating speed through the driving circuit, and the preset rotating speed is generally half of the maximum velocity when the electric vehicle runs normally.