A study on the wood properties of natural growth poplar (Populus davidiana) from six northern provinces of China has been done. The results of morphology of fibre, proportion of different tissues, physical and mechanical properties, chemical composition have been studied. The stems of six provenience poplar contained much gelatinous fiber, tylesis and pith fleck. The physical and meehanical properties of six provenances changed within different groups. This poplar is a good pulping material.