Abstract: On the basis of the principle that distribution of speeies is related with specific geographical environment,we divided China into 55 sinall regions aecording to the difference of geomorphy and climate．By analysing the relation of the total of speeies and the main environmental factors n each small region．we get conclution s as folio-wing.
The species den sity of chiroptera is related to temperature humidity，elevatio and geomorphy ete．The main factor that affeete the species den sity is different in various region：It is mainly restricted by temperature in monsoon region; humidity and eleva-tion in Qin ghai-Xizang region ;humidity in the east of Mengxin reglen; but the den-sityof human population is the main restricted factor in the west of Mon go-Xinjiang region．

Key words: Chiroptera, Species density, Environmental factor, Small region.

摘要： 本文通过划分小区和运用相关分析法，分析了翼手目|物种密度分布与主要环境因素的关系。在海拔2000米以上地区物种密度明显减少，海拔4000米以上则非常贫乏，其物种数还随纬度升高而递减。物种密度分布与年均温呈正相关关系，与相对湿度呈半对数线性关系，与日照时数呈负相关关系。但翼手目物种密度最高处并不是温湿度最高地区，而是在碳酸盐岩发达的有丰富山洞地貌的低山丘陵地区。

关键词: 翼手目, 物种密度, 环境因素, 小区