This study is an open-label multicenter randomized control study. Patients with with decompensated cirrhosis will be randomly assigned to receive MSC treatment plus standard medical care(treatment）or standard medical care (control). Three times of MSC infusion (1x10E6 cells/kg body weight) via peripheral vein will be given to the experimental group (once in 4 weeks). The primary outcome is absolute change in liver function indexes and and scores. Secondary outcomes are cirrhosis-related complications, symptoms, life quality, and survival.