In recent years, the tower scale, the height of air inlet, the length of diagonal strut become larger and larger. The traditional diagonal strut is not suitable for high air inlet, due to the significant increase of the section dimensions and concrete amount of traditional diagonal strut. Based on the analysis of all kinds of diagonal strut programs used in practical engineering, three new diagonal strut programs were proposed. This paper discussed the feature and select condition of all kinds of diagonal struts in order to recommend the suitable diagonal strut.