Background:During the production of tea

tea dust has been viewed as a risk factor that may cause the suffering of changes of lung function and respiratory symptoms.Objective:To review whether the occupational exposure to tea dust may lead to the changes of lung function and respiratory symptoms.Methods:We searched the literatures in March 2012 in the databases of Medline

EMBase

Web of Science

Wan-Fang Database and CNKI.The search condition is"（herb OR tea）AND（lung function OR ventilatory function OR pulmonary function OR spirometric measurement）".The paper should be pubished in Enghish or Chinese

with internal or external controls.Results:Totally 17 papers were included.Both acute and chronic changes of lung function were referred.In addition

the respiratory symptoms such as cough

tightness and etc.were also reported and discussed.Conclusion:We concluded that the exposure of tea dust may lead to the changes of lung function and respiratory symptoms.