To explore the patterns and functions of bridging behavior,we studied the bridging behavior of YA₁ colony of Tibetan Macaque（Macaca thibetana）from March to May in 2007 at Mt.Huangshan,Anhui Province,China.The results indicated that the frequency of this behavior was significantly different at different time period（t=3.912,df=10,P<0.01）.Adult male monkeys were the main doers（Z=-2.188 8,P<0.05）and recipients（Z=-2.523 8,P<0.05）of bridging process.Within the same age group,sex didn't influence rates of initiating（Z=-1.755,P>0.05）but did influence rates of receiving（Z=-2.201,P<0.05）.Bridging partners mainly used infants（F=6.735,df=2,P<0.05）as the bridging medium and preferred to using male infants（Z=-2.437,P<0.05）.Moreover,mothers' social rank influenced frequency of their infants used as bridging medium in bridging process（Z=-3.724,P<0.01）;partners mostly used high-ranking mothers' infants.Males（F=2.947,df=4,P<0.05）and females（F=5.320,df=4,P<0.05）mostly performs pattern Ⅰ bridging behavior.Females usually chose relatives as the bridging medium（Z=-2.490,P<0.05）,but males didn't show obvious selectivity for the maternal offsprings（Z=-0.866,P>0.05）.In conclusion,the short-term research indicate that social bridging behavior in Tibetan Macaques social group mainly occurs in pattern Ⅰ and it has function of alleviation the competing pressure among individuals.The kinship may not be the primary factor affecting choosing the bridging behavior medium.