Abstract: The development of skin and hair follicle traits have been studied on the Inner Mongolian Arbas goats in the fetal period. Skin samples were obtained from 10 different body parts of fetuses at the age of 55 days to birth. The results showed that the complete structure of epidermis layer formed at the age of 55-65 days and epidermis was the thickest at the age of 85-95 days; Dermis thickness increased rapidly at the age of 95-125 days. The primary hair follicle was seen first at the age of 55 days while secondary hair follicle at the age of 65 days. Moreover, an important fact that secondary hair follicle is a branch of primary hair follicle has been found first on cashmere goat. The sebaceous gland and sweat gland were seen at the age of 85 and 95 days, respectively. Wool and cashmere began to grow at the age of 95 days. Wool came out of the skin surface at the age of 95 days while cashmere at the age of 115 days. The primary and secondary follicle grew very fast at the age of 95-115 days and 105-125 days, respectively. The density of primary follicle showed highest at the age of 75-85 days and secondary follicle at the age of 105-125 days. The value of S/P was the biggest at the age of 115 days to birth. The hair follicle group pattern formed at the age of the 105 days, trio group is dominant.