[Objective] The coal gangue mountains

the occupied land

and the surface vegetation destroyed by coal mining were analyzed to classify the types of coal gangue site properly. The objective of the study was to provide a basis for ecological restoration and reconstruction of mining areas.[Methods] The coal gangue in the Ningdong mining area was taken as the research object. Ten site factors were investigated and analyzed for microtopography

altitude

thickness of covering soil

and soil texture. Methods such as principal component analysis and cluster analysis were used to classify coal gangue mountain site types.[Results] The dominant factors were determined by principal component analysis as microtopography

thickness of covering soil

and soil texture. Afterwards

according to the dominant factors

the coal gangue mountains in the Ningdong mining area were classified into three site type groups

five site type subgroups

and eight site types through cluster analysis for various areas. The coal gangue platform had a large area

with slopes between 32° and 40°

and the thickness of the coal gangue overburden was > 30 cm. The soil field water capacity was between 16.82% and 34.85%

and the total K content was between 34.29 and 46.61 g/kg

which was extremely high. The total P content was between 0.31 and 0.62 g/kg

which was medium to low level. However

soil organic matter and total N content were at very low levels

and the soil of the coal gangue was more alkaline.[Conclusion] The reconstruction of gangue in Ningdong mining area should take measures according to local conditions. When gravel is less in overlaying soil

the arbor-shrub mixed pattern is selected with arbor based

or shrub pattern

or shrub grass pattern with shrub based. Whereas

the shrub grass pattern with grass based is selected when gravel is more. When the soil is light gravel

grass seeds are sown.