In view of features of highway visual impact assessment,the subject and object of highway visual impact assessment have been analyzed.The subject is "people" that is observers and the object is landscape visual resources,landscape visual features and landscape visual quality.On this basis,the paper has proposed the content and model for highway visual impact assessment,further introduced methods for the assessment of highway visual integration and the prediction of visual quality change,and finally put forward measures alleviating highway visual impact from the perspective of preventing,reducing,restoring and compensating.It aims to reduce the influence on landscape visual environment to the minimum level during highway construction.