A Flexible Liquid Crystal Micro-Lens Arrays （LC MLAs） with an adjustable focal length was designed and prepared to solve the narrow viewing angle of the integrated imaging. In this paper， the hole-patterned driven- electrode arrays were fabricated by a photolithography technology and the flexible Polyimide （PI） film was prepared by a spin coating method on the flexible ITO glass substrate. After the PI film layer was heated at 60°C for 5 min， the PI orientation layer was formed by using the plasma at a power of 630 W for 5 minutes. The optical properties of LC MLAs with a flat substrate and a curvature radius of 7.5cm were studied after the LC MLAs were fabricated. The experimental results show that the prepared LC MLAs can achieve the excellent focusing properties under the condition of a flat plate and a curvature radius of 7.5 cm. The interference patterns are uniform and the focal radius are small when the operating voltages are applied to the LC MLAs. Further， the focal length of the flexible LC MLAs with the curvature radius of 7.5 cm can be tunable from 0.43 mm to 1.05 mm when the operating voltages are changed from 3 Vrms to 5.3 Vrms.