The qualities of the rice straw, black locust and orchardgrass silage added with grape pomace were investigated in this study and the amount of grape pomace added in different treatments were 0, 20, 40 and 60%, respectively. Crude protein contents of rice straw(6.5~10.6%) and orchardgrass silage(13.2~14.8%) added with grape pomace were significantly higher(p＜0.05) than that of 100% rice straw(5.3%) and orchard grass silage(12.8%), however the crude protein contents(14.9~15.6%) of black locust silage in supplementation were lower than that of 100% black locust silage(16.3%). With higher amount of addition of grape pomace to rice straw, black locust and orchardgrass silages, ADF, NDF and crude ash contents decreased significantly(p