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Based on Ginkgo materials from Guilin of Guangxi��Hefei of Anhui and Shenyang of Liaoning��the authors studied the response of Ginkgo to climatic condition in different climatic zones through the contrast of microscopic morphological characters of Ginkgo leaves and petioles�� The results show that some microscopic characters varied greatly in different climatic zones�� The stomatal length and the ratio of length to width of guard cells decreased with the increase of latitude��and the anticlinal wall width��the ratio of length to width of ordinary epidermal cells and the width of guard cells increased with the increase of latitude�� These characteristics changes may respond to the variations of temperature and precipitation of their living environment��which benefits the study of paleoclimate indicated by fossil Ginkgo through the geological time��