Abstract: The scale and the investment for the noise barrier construction of Ningbo rail transit Line 1 are all largest in the urban rail transit projects over the same period in China. In particular, a large number of fully-enclosed noise barrier measures are adopted. Therefore, many problems need to be researched and solved in the design process. According to the characteristics of this project, the design tasks, principles and emphases of noise barrier are put forward, and some special researches are carried out. In the subject of landscape modeling, a number of landscape design measures are adopted and three kinds of deck layout schemes are compared and analyzed. Appropriate noise barrier materials are selected according to specific properties. In the research on the performance of the fully-enclosed noise barrier, combined with the respective analysis of the internal thermal environment, the influence on the smoke extraction and the acoustic effect, and the comprehensive solutions are given. Finally, the design scheme of the noise barriers of Line 1 is introduced. The test results of the noise barriers after implementation reach the expected noise reduction effects and meet the requirements of environmental protection. This project has a demonstration function to the noise barrier design of domestic urban rail transit.