In order to meet people′s requirements of large acceptance aperture and high re solution of mobile phone lens at present,this paper applies optical design softw are Zemax to design a 13-megapixel mobile ph one lens with large acceptance aperture based on the theory of geometrical optic s,and the extended odd aspherical surfaces are used to correct the aberration of the system in the design.The lens only consists of four extended odd aspherical lenses and a filter,and it has simple and compact structure;its F-number is 2. 17,the whole field of view is 73.2°,the effective focal length is 3.93mm,and t he total length of the lens is 6.00mm.The MTF (modulation transfer function) of central field of view of the middle frequency (223lp/mm) in the meridional and sagittal directions are grea ter than 0.33and 0.60,respectively,and that of the high frequency (446lp/mm) are greater than 0.13and 0.27;and that of in the 0.8field of view of the mid dle frequency are greater than 0.33and 0.53,respectively.This study shows that the imaging performance of the optimized design of the mobile phone lens can ful ly meet the application requirement.