Soil erosion is a serious global environmental problem which limits the survival and development of
human beings． In our country，due to the special physical geography and socio-economic conditions，soil erosion intensity
is great，which is particularly prominent in Loess Plateau region． Therefore，preventing and controlling soil
erosion，as well as reducing soil erosion in Loess Plateau have become the key to solving environmental problems in
the region． Soil erosion on Loess Plateau is serious，and grassland vegetation has good effects on soil and water conservation，
which can improve ecological environment well． After the implementation of the project about returningfarmland to grassland on Loess Plateau，the ecological benefits mainly focused on soil and water conservation benefits，
soil improvement benefits，water conservation benefits and species diversity benefits，etc． Grassland vegetation
has an irreplaceable role in the construction of the ecological environment on Loess Plateau． Therefore，the role of
grassland in preventing soil erosion has received more and more attention． Scholars have done lots of research involved
in the relationship between grassland coverage and soil erosion，impacts of grassland on hydrodynamic parameters，
effects of grassland on soil properties，reduction effects of grassland on runoff and sediment，and soil erosion
process on grassland slope． However，there is little research on erosion effect induced by grassland cover． This
paper mainly pointed out the following questions: First，grassland cover is influenced by many factors，but the relationship
with soil erosion from the dynamic mechanism is rarely discussed; Second，there is no well-developed theory
of overland flow erosion at present，which limits the study of hydrodynamic parameters on grassland slope;
Third，establishment of mathematical model between grassland cover and soil resistance can accelerate the quantitative
analysis of grassland influence on erosion; Fourth，comprehensive analysis of influencing factors on water reduction
and sediment reduction effect on grassland are insufficient; Fifth，there are not many mechanisms to analyze
the erosion process of grassland slope by using the hydrodynamic characteristics of slope; sixth，research results
on grassland-induced erosion are mainly focused on leading to soil dry layer and we should continue to
strengthen in the future． This paper summarized the previous results，and supplemented some studies about erosion
caused by grassland，then pointed out the existing problems in current research and the areas that need to be strengthened in the future，aiming at reducing soil erosion on the Loess Plateau．
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