Abstract: In order to study the supplementary feeding effect of grazing lamb with ryegrass planted by goat raising households in grass-withering period,the supplementary feeding test with ryegrass was conducted on 1.5-2.5 month-old grazing lambs to observe the weight gain difference with the lamb without supplementing ryegrass.The results showed that the weight gain of lamb with supplementing ryegrass increased by 43% than that without supplementing ryegrass.When 667 m2 of ryegrass was planted,the comparative benefit of 14 810.64 yuan could be achieved by supplementing lamb with ryegrass.