The invention discloses an electric vehicle permanent magnet DC brushless motor controller and a control method. The electric vehicle permanent magnet DC brushless motor controller comprises a control unit, a power driving unit, an inverter unit and BLDCM, a position detection unit and a signal input unit; subjects various input signals to logic synthesis in order to provide various control signals for a driving circuit; generates a PWM signal with a corresponding duty cycle in order to adjust the rotating speed of a motor, realizes motor self-locking by changing a driving timing sequence; and achieves overcurrent, undervoltage, and overvoltage fault protection functions. While guaranteeing the normal operation of an electric vehicle, the electric vehicle permanent magnet DC brushless motor controller improves the efficiency of the motor and a storage battery, saves energy, is simple in hardware structure, low in cost, perfect in function and high in reliability, and has high application and promotion values.