Abstract: The age, weight and number of hair strands bend of Zhongwei goat under the condition of grazing from 1997 to 2002 were studied. The results showed that average day-age and body weight of Zhongwei goat male lambs in Goumao period were slightly higher than the female lamb,and the average number of hair strands bend was lower than the female lamb. Furthermore, the day-age of Zhongwei goat in Goumao period had a certain relationship with the weight and the number of hair strands bend, that was the longer the day-age was in Goumao period, and the smaller the weight was, the more the number of hair strands bend was.