Abstract: Twenty four Taihang rhesus macaques (Macaca mulatta mulatta)’skulls were collected and measured. Statistical test were showed that of all 20 variables 8 have significant sex differences. Six skull sex discriminant functions were set up by Fisher’s method, whose discriminant rate ranges from 87.5%-91.7%.The results confirmed the functions were suitable for sex discrimination of skulls which have different damage degree, and suggested their high application values in practice.