To meet the demand for differentiated field of view of near-infrared time of flight lenses in smart home devices, this paper designs a near-infrared wide-angle lens based on a special surface using CodeV optical design software. The lens consists of four plastic lenses and one infrared bandpass filter. The four plastic lenses adopt a negative-positive-positive-positive lens structure, and the lens type is a combination of deformable non spherical and free curved surfaces. The design simulation results show that the F-number of the lens is 3.5, the maximum angle of the full field of view is 127°, the ratio of horizontal and vertical angles is 1.8:1, the total length of the system is 11.9 mm, and the modulation transfer function (MTF) is greater than 40% when the spatial frequency is 83 lp/mm, which can complete the function of near-infrared recognition and detection tasks very well.