A new liquid crystal (LC) micro-lens array is proposed based on structure and design methods of the single circular hole electrode LC lens with 128×128 elements. The LC micro-lens array is an electrically driving and controlling micro-lens array with tunable focal length. And the Indium Tin Oxides (ITO) glasses are used as the top and bottom substrates of the LC micro-lens array. The top electrode patterns are got by the methods of lithography and hydrochloric acid etching. The top electrode patterns have 128×128 elements. Every element is a single circular hole of 50μm diameter. The distance between circular holes is 100μm. The bottom electrode is just ITO film. And the thickness of LC layer between the top and bottom electrode is about 20μm. The focal length of the LC micro-lens array can be electric tunable from 50μm to 400μm under operating voltage from 0.2 VRMS to 5.0 VRMS. The result of the test shows that the point spread function of the LC micro-lens array is close to the theory values. And the relationship of operating voltage and focal length is inverse proportion. The imaging characteristic of the LC micro-lens array is like the imaging characteristic of conventional optical micro-lens array.