【Objective】The present experiment was conducted to investigate the effects of green manure on the ecosystem of tea garden in order to find out reasonable measures for managing tea garden and ensure its sustainability and healthy development. 【Method】In accordance with previous studies， the impacts of green manure on ecosystem of tea garden and the current issues were analyzed and suitable varieties for tea garden and strategies in its sustainable development were proposed. 【Result】Green manure was found to bring the following assets to tea garden: soil fertility and microclimate enhancement， soil and water loss prevention， better moisture in soil， better tea quality， more economic benefits and a more steady ecosystem. For the time being， there were a few problems， restricting the use of green manure， such as insufficient knowledge of tea farmers， lesser number of promoting channels， lack of good cultivation practices and their management， and inadequate green manure varieties due to long and slow breeding processes， etc. 【Suggestion】In order to further promote the application of green manure in tea garden， there should be more publicity， technology extension and more green manure varieties to be used in tea gardens.