The songs of Yellow-bellied Tits (Parus venustulus) were recorded during April and March, 2006 and June, 2007 in Beijing Xiaolongmen forest. The acoustic characteristics of songs were measured and analyzed with Avisoft-SASLab Pro software (Germany). The songs of Yellow-bellied Tits have simple verse structure, formed with repeat syllables. The repertoire of Yellow-bellied Tits includes 56 syllable types. Significant positive correlation was found between the number of syllable types and sampling individuals (r=0.973, P=0.000<0.05). Differences in territory songs found among individuals may be related to individual identification. Compared with four other species distributed in the same area, the Yellow-bellied Tit had the shortest verse (Dv =0.83±0.48), higher maximum frequency (Fmax=7.64±1.01, Fmin =3.27±1.13), and the least repeat syllables in its verse (Ns.v=2.0±0.2).