Abstract: According to landscape ecology， based on qualitative and quantitative analysis， the paper firstly analyses landscape ecological construction indicators about the Roads Greenbelts such as landscape diversity index， landscape dominance index， landscape evenness index in Zhengzhou city .Four types of the greenbelt landscape：the composition of the plant community，the number of the species， the level as well as the color of plants are considered for the study of the landscape diversity， whose application and influence on the road greenbelts are also analyzed．The result shows that the landscape diversity of the road greenbelts in Zhengzhou city is of little difference on the analysis of the composition of the plant community， so the composition of the whole is simple and the types are few； But the diversity index is the biggest on the analysis of the species， which shows that there are much difference on species for the different road greenbelts in Zhengzhou city； The diversity index is a bit low from the point of the level．which shows that there is little difference between different parts of the greenbelts； The diversity index is a bit high from the point of the color， which shows that there is difference between different parts of the greenbelts . and the predominance is the highest， so one type of color is dominant among those colors of the greenbelts．