According to the human visual system (HVS) and the properties of infrared image,this paper has researched on the infrared image histogram equalization for different background pixels,and proposes an infrared image enhancement technology based on HVS.Theoretical analysis and experimental results show that,compared with traditional histogram equalization enhancement method,the proposed method has more clear details and better contrast.The target information can be easily noticed by human visual.It has a good value for practical application.