Abstract: The author tracks and monitors the Chinese fir low yield forest interplanting chinese yew or nanmu these 2 kinds of techniques , and analysis the benefit of the adaptability and effectiveness of rare and endangered tree species,the influence on the growth of chinese fir,the influence on the soil fertility.the results show that :the growth indexes of chinese yew or nanmu in the low yield forest of chinese fir were relatively good, and this was a feasible method for the transformation of low-yield forest in fir wood. It can significantly promote the growth of Chinese fir trees, but interplant nanmu has better effect; Both the chinese yew and nanmu model can effectively improve the physical and chemical properties of the soil, but interplant nanmu has better effect.