[Objective] The tree species mixation strategy in accurate quality improvement of Larix principis-rupprechtii plantation was studied in order provide reference for the forest management in the north of Shanxi Province.[Methods] Permanent sample plots of Larix principis-rupprechtii forests were set in Guancen Mountain with different mixed modes and different origins. The diameters were measured at breast height of each tree whose diameter was more than 5.0 cm in the sample plot in the summers of 2010 and 2015

respectively. The differences of the growth of mixed tree species under different origins and different mixed modes were compared by ANOVA and t test.[Results] ① For the tree species mixed with Larix principis-rupprechtii

the growth of DBH was as follows:ΔDBetula platyphylla > ΔDPicea meyeri > ΔDSalix pseudotangii

the basal area increment of chest height was as follows:ΔSBetula platyphylla > ΔSPicea meyeri > ΔSSalix pseudotangii

the cumulative growth rate is as follows:ΔVBetula platyphylla ≈ ΔVPicea meyeri > ΔVSalix pseudotangii. ② Under different mixed modes

the differences of ΔS and ΔV of Larix principis-rupprechtii were insignificant. ③ Under the condition of natural young and middle aged forests

the growth of mixed tree species was ranked as follows:Picea meyeri > Betula platyphylla > Salix pseudotangii; Under the condition of young and middle aged plantation

the growth of Betula platyphylla was the largest. ④ The growth of Picea meyeri with natural Larix principis-rupprechtii was larger than the one with the planted Larix principis-rupprechtii; the growth of Betula platyphylla with planted Larix principis-rupprechtii was larger than that with the natural one.[Conclusion] In the young ages of Larix principis-rupprechtii plantation

Betula platyphylla can be planted in the glade

which can form a mosaic mixed structure of Larix principis-rupprechtii and Betula platyphylla. Through the mixed plantation of broadleaf tree species with Larix principis-rupprechtii

a more stable and near-natural ecological environment will be created. When the growth and the ecological function of Betula platyphylla declines

Betula platyphylla that cannot play effective ecological function should be cut and Picea meyeri is advised to planted under the canopy. Larix principis-rupprechtii and Picea meyeri can form stable

mixed

multilayer and different aged forests.