This paper compared the physical mechanics property of larch wood in different planting densities. The results showed that there are great effects on tile physical mechanics property of larch plantation. Some physical mechanics of larch such as the growth rate and late wood percentage show L23>L21 >L22. when dry-through. rate drying shrinkage along the grain and across tile grain and volume drying shrinkage rate show L23 >L22 >L21. The differences of growth rate. growth-ring width and late-wood rate are not...