The only survivor was admitted to a hospital after the landslide hit a village Friday night, stater-run Xinhua news agency reported.
The landslide hit in Lidong Village of Yaxi Township in the outlying Liandu District of Lishui City on Friday night.
Torrents of mud and rocks buried 27 homes in the village, with 21 houses flooded and more than 300 people have been evacuated, it said.
More than 2,300 rescuers, along with 7 sniffer dogs, are helping with rescue work.