The land erosion is very serious in South China, including 15 provinces mainly and the water ersoison is main. The water erosion occupies an area of 683320km², being 38.1% of total water erosion area in China. The land erosion in South China has himself charactericstic, which differs from Nouth China, as a result of natural and social environment.

The following questions are discussed in this article:

1. The debris flow and landslide are widely distributed and develope in west mountainous region.

2. The limestone, granite and purple rocks have a very widely distribution, as well as possess themselves erosive characteristics.

3. The harm of land erosion is severe. The main harms are follows: the area of bare rock is developing. The moderate and small rivers were deposited, the river bed is rising gradually. The reservoir and lake were deposited by sediment too, and their capacity is reducing gradually.

4. The sediment delivery ratio of land erosion is small, only 0.1-0.5.