Abstract: With the study on some environmental material, the function and task of the greenbelt created during the construction of city roads has been put forward. The focus of this thesis lies in the idea of environment protection and human- connection and a conception of " greenroad" is formed. The problems that should be paid special attention to in the afforestation plan in the design of city roads are summarized. Meanwhile, the afforestation plan should be made according to its function and object of service has been emphasized.