To meet the command of panoramic three-dimensional head mounted display that is wide field of view (FOV), high resolving power and compact, light-weight structure, an optical system of eyepieces is designed. The dispersion characteristics of binary optical element (BOE) is used to correct the chromatic aberration, and the aspheric surface is selected to correct the aberrations (spherical aberration,astigmatism, coma and distortion). The organic light-emitting diode (OLED) micro-displayer is used to achieve compact and light-weight structure. Furthermore, the field-of-view-stitching method is used to obtain wide field of view. Obtained optical system can offer the horizontal FOV of 120°, the vertical FOV of 60°. Moreover, resolving power is 43 pixel/(°), the modulaiton transfer function (MTF)is higher than 0.45 at the spatial frequency of 45 lp/mm across the entire visual field, and the maximum distortion is less than 0.2% . The optical system has perfect performance and can meet the domanial demands of virtual reality display.