This study will be a randomized, double-blind, positive control clinical trial with a course of 24 weeks.~Random scheme:the DAS for Interactive Web Response System(IWRS) will be used to calculate and distribute random numbers and dispensing drugs.~Blind method ：The test process will be in a double-blind state.~Control drug: The lung rehabilitation training will be used as control in this trial.
This study will evaluate the safety and efficacy of Jianfei Kangfu Cao in the treatment of primary Sjogren's syndrome associated interstitial lung disease.