Abstract: As the generally developing of cataract phacoemulsification, the complaints of dry eye, such as dry sensation, foreign body sensation, burning sensation and so on, were complained by some of the patients after cataract extraction. The operation time, the length and location of incision, and the medicines using in the perioperation period significantly affect the function of tear film. Oculists should pay more attention to the causes and characteristics. Maintaining the normal structure of tear film, shortening the operation time, and reducing the mechanical injury to the cornea and conjunctiva during the operations, treating timely and exactly after the operations are helpful to the patients getting better surgical outcomes and quality of life.