The structure of the new double asymmetric liquid crystal lens is improved on the basis of the single round hole electrode liquid crystal lens. Combined with geometrical optics and liquid crystal theory, Zemax is used to simulate and optimize the parameters of this double layer structure liquid crystal lens. Zemax analysis results show that in the same low drive voltage( in the range of 2.5Vrms to 20Vrms) and at the angle of view with 0°, 3.5°and 5°, the double layer structure lens has wider focusing range than the single layer structure lens. The short focal length reduces from 19.6172 mm to 9.9059 mm. The aberration is significantly reduced. When the optical modulation transfer function (MTF) is 0.6, the radial direction resolution increases from 12.06 lp/mm to 21.02 lp/mm, almost doubled. The image resolution and clarity are significantly improved. The high frequency part MTF increases from 0.1 to 0.3. Finally, the experiment verifies that the diffraction specular of the double layer structure liquid crystal lens is the smallest at 20Vrms.