The invention discloses a driver of a linear motor and a driving method thereof. The driver comprises a DSP, a switch power supply, a drive circuit, a motor feedback position acquisition unit, a motor feedback rotary speed computing unit, a motor feedback current acquisition unit, a position ring computing unit, a speed ring computing unit, and a vector control unit, wherein the DSP controls a position ring circuit, a speed ring circuit and a current ring circuit of a linear motor; the motor feedback position acquisition unit obtains the actual position of a motor rotor; the motor feedback rotary speed computing unit works out the actual rotary speed of the motor according to the actual position of the motor rotor and the measuring time; and the motor feedback current acquisition unit samples by a resistor, sends the sample to an AD converter through linear opto coupling insulation, and sends the sampling signal to the DSP through a serial port after converting analog signal to digital signal. The driver can complete the drive control of the linear motor, and the cost is low; and the driver is suitably applied in fields where mass data need to be processed at a high speed and in real time, and can fully meet the requirements of the linear motor on mass data and high processing speed.