In order to improve the quality of Pinus massoniana stand in soil erosion area of Changting County,Fujian Province,an experiment of interplanting broad-leaved tree was carried out.The results showed that different interplanting patterns had significant effects on the tree height and subbranch height of Pinus massoniana.Interplanting Sapindus saponaria was most beneficial to promote the growth of tree height and subbranch height of Pinus massoniana,which reached 14.50m and 9.57m respectively.The second was interplanting Schima superba model.The average tree height and under-branch height of Pinus massoniana were 10.43m and 9.50m respectively,and the difference between them was not significant.The interplanting Schima superba performed best growth,with an average diameter at breast height of 6.9cm and an average tree height of 7.4m.The results of species diversity analysis of Pinus massoniana forest with 6 years of interplanting showed that the interplanting of Sapindus saponaria was beneficial to improve the species diversity of Pinus massoniana forest,and the Shannon-Wienner index of shrub layer and herb layer were 1.09 and 1.24 respectively,and the species richness index were 3.91 and 2.39 respectively.The effects of interplanting mode on soil physical and chemical properties of Pinus massoniana stand were further analyzed in the paper.The results showed that interplanting broad-leaf tree did not significantly affect soil physical properties,while the soil nutrients of the stand were obviously improved.The mode of interplanting Liquidambar formosana or Schima superba had the best effect.