It is a problem that the conventional stereoscopic display imaging does not satisfy with the regular imaging rules of human eyes. Besides, the miniaturization of wearable device needs to be considered. In order to solve these problems, Zemax is used to design a multifocal planes projection optical system combined with the digital micro-mirror device(DMD) and piezoelectric deformable mirrors(PDM), based on calculating analysis of optical system parameters. This optical system uses double-telecentric optical path which is composed of seven lenses with a total length of 200 mm and a field of view of 40°. According to the overall analysis, changing the curvature radius of PDM can realize the multifocal planes imaging. At a particular position, human eyes can observe the overall three-dimensional effect which is overlapped by two dimensional images at the location of each focal plane (range from 0 to 3 m -1). Finally, the imaging quality of the system is analyzed. The result shows that the modulation transfer function (MTF) value of the system is higher than 0.4 at the limit resolution of 37 lp/mm in all field of view. The performance is well and it meets the design requirement.