Abstract: The mating activities of a captive group of Macaca thibetana was observed with all occurrence method.The aim of this paper is to discuss the copulatory behavior pattern of the species,the role played by females in mating activities,and other aspects related to mating activities.The conclusions are 1) M.thibetana is both the multipleand single-mount ejaculator,rather than the typical single-mount ejaculator;2)females,like males,play an active role in the mating activity,particularly in the choice of mating parther;and 3) there exists sexual harassment by females of M.thibetana when copulation occurs.The social rank of females may be affected by their mating activities.