【Purposes】Shanxi Province has the largest number of ancient timber structures in Chi⁃
na. With the larch wood replaced by maintenance from an ancient building in Shanxi as the test ob⁃
ject， the material property tests of density， moisture content， compressive strength along the grain，
bending strength， and bending elastic modulus， and the non-destructive tests of micro-drilling resis⁃
tance value and stress wave velocity were carried out.【Methods】 According to the test data， the cor⁃
relation between the mechanical properties and the non-destructive parameters was analyzed， and the
optimal calculation model of material property was selected by comparative analysis. Then， the influ⁃
ence of different testing conditions （drill needle speed， drill needle direction） on the results of non-de⁃
structive testing was studied.【Findings】The test results show that the optimal calculate model is to use microdrill resistance to calculate the wood density， while to use wave resistance modulus to calcula te wood compressive strength along the grain， bending strength and bending elastic modulus.The resistance values of microdrill decrease with the increase of drill needle speed， and the resistance values of chord detection are greater than those of cross detection. The research results of this paper can provide support for the safety assessment of ancient wooden structures in Shanxi.