A novel 128×128 elements liquid crystal lens array with tunable focal length was analyzed and fabricated by using frequency drive instead of voltage drive. The top electrode was designed as circular array electrode. As the electric field was inhomogeneous in circular unit,the rotation angle was different in liquid crystal layer. Then the gradient refractive index was formed,and the optic in the circular unit was convergent. The effect about focal length of liquid crystal lens array with different frequencies was analyzed. The focal length range of liquid crystal lens array was 20-600 μm. The focal size was 10 μm. The response time was sub-microsecond. The liquid crystal lens array driven by frequency can be got in this way. So the operating voltage of liquid crystal lens array was lower,and the response time of liquid crystal lens array was quicker.