Road extraction methods from SAR Image are important in the field of SAR image recognition and detection. In the past few decades, scholars at home and abroad have done a lot of experiments and researches. Through the analysis of the current situation, it firstly introduces the road characteristics of SAR image and basic strategies of road extraction. Then, the existing road extraction methods from SAR image are summarized. Finally, the prospective road extraction researches from SAR image are put forward.