Abstract: With the traditional paraffin section method, observed by optical election microscope, the anatomy structures of branches and leaves of Tilia amurensis in different altitude in Changbai Mountain was compared and analyzed. The results indicate: the growth of Tilia amurensis was normal from 600 to 1 100 m; the anatomy structures of annual, biennial, branches and leaves of Tilia amurensis presents a definite changes; orderliness according to the changes of altitude; the effect on the different structures of anatomy branches and leaves by altitude is different; the most suitable altitude height for the growing of Tilia amurensis in Changbai mountain was from 700 to 900 m according to observed synthetically.

Key words: Tilia amurensis, different altitude, anatomy structure