In the spring-summer of 1997,2002 and 2005,the vocalization of 40 birds of Chinese Leaf Warbler(Phylloscopus yunnanensis)was collected in Shaanxi,Sichuan and Gansu Provinces and analyzed.We found that both songs and calls varied between individuals in the same area.We failed to find any significant difference in the highest and lowest frequencies among the characteristics of the songs collected at Lianhuashan(Gansu),Taibaishan(Shaanxi)and Longxihongkou(Sichuan),however,the duration between syllables and number of notes showed significant differences.Birds living in forest at higher altitude presented territory songs with lower frequency.