Rescuers found the bodies of two children, a mother with her baby and another woman on Thursday in Shuicheng County, Guizhou province, according to state broadcaster CCTV, citing an investigation.
Eleven people have been found alive since the side of a hill collapsed on 23 homes late on Tuesday, covering them in thick mud, AFP reported.
Landslides are a frequent danger in rural and mountainous parts of China, particularly after heavy rain, and the country has suffered heavy flooding this year.