Streetscape planning and design has important significance for improving urban landscape and increasing urban quality. Cixi segment of national highway NO.329 is the landscape and window to the outside of Cixi. According to the related upper planning, function of the street mostly is commerce. The paper analyzes design method about streetscape planning along the national highway by using the case of Cixi segment of national highway NO.329. The planning attempts to construct Cixi segment of national highway NO.329 to be Yingbin avenue of the city, which could reflect the image of Cixi with smooth traffic, quiet surrouding and orderly space. The paper introduces general plotting of streetscape planning from angles of coordination of architectural styles, scrutiny of space dimension, and style of single architecture, and then amply analyzes design method of streetscape planning from angles of space level and scale, node processing, open and retractation of space, levels and penetration of plane space, rhythm and depth of elevation, and architectural features.