The diffractive optical element, with the negative dispersive characteristic and the random phase distributing to realize random phase modulation for wave-front, is helpful to simplify the optical system, and the optical plastic elements further reduce the weight of the system. A plastic hybrid diffractive-refractive eyepiece for head-mounted display is designed, the features of the eyepiece are 30 mm effective focal length, 40° field-of-view (FOV), 20 mm exit pupil and 8 mm exit pupil size, and which consists of three lens and one diffractive element. The maximal diameter of lens and the overall weight of this eyepiece are 26 mm and 7 g, respectively. For the image quality, the astigmatic and lateral color of the key aberrations of eyepiece are 0.58 mm and 18 μm, and the distortion is only 3.3%. The angular resolution of this eyepiece is 0.44 mrad and less than that of human eyes.