ABSTRACT The experiment was conducted at Assosa ATVET College to evaluate the effect of untreated and urea molasses treated finger millet straw and lowland bamboo leaf hay as basal diet on nutirent utilization, growth and carcass characteristics of local sheep; in Benishangul Gumz. Twenty yearling intact male local sheep with initial body weight before the 21.6 ± 1.31 kg (mean ± SD) were purchased from local market and were used for 10 days digestibility study and 90 days feeding trial. The sheep were grouped into five blocks of four animals and randomly assigned to four dietary treatments. The four experimental feeds were untreated finger millet straw (UFMS) + 150 g wheat bran (WB) and noug Seed (NSC) mixture (T1), untreated lowland bamboo leaf hay (ULBLH) + 150 g WB and NSC mixture ( T2), urea molasses (UM) treated finger millet straw (TFMS) + 150 g WB and NSC ( T3) and UM treated lowland bamboo leaf hay (TLBLH) + 150 g WB and NSC mixture (T4), the basal diet was weighed with sensitive balance and offered. Water and salt were available all times throughout the experimental period. Data were analyzed using General Linear Model (GLM) procedure of SAS software version (9.1). The crude protein (CP) content of UFMS, ULBLH, TFMS and TLBLH were 6.74, 15.87, 12.66 and 21.8 % respectively. The DM intake was higher (P < 0.001) for T2 and T4 than T1 and T3. Urea molasses treatment results higher improvement on intake of CP. The apparent CP digestibility were higher (P<0.001) for T4 than T3, and T2 and T1. (T4>T3=T2>T1). The apparent DM, OM and NDF digestibility was lower (P < 0.05) for T1 than other treatment (T4=T2=T3>T1). Average daily gain (ADG), body weight change (BWC) and final body weight gain (FBWG) were higher (P < 0.001) for T2 and T4 than T1. Moreover, ADG, BWC and FBWC for T4 were higher (P < 0.001) than T3. Slaughter BW was significantly different (P < 0.001) among treatments (T1<T3=T2=T4). The empty BW, hot carcass weight and rib eye area were significantly higher (P < 0.05) for T2, T3 and T4 than T1. Dressing percentage on the basis of EBW and SW were higher (P < 0.05) for treated group than untreated group (T4=T3>T2=T1). The total edible offal components, total non-edible offal components and total edible products were significantly higher (P < 0.05) for T4 than T1, while similar with T2 and T3. In conclusion urea molasses treatment could be taken as an option to improve nutritive value of lowland bamboo leaf hay and finger millet straw. Interims of CP content, finger millet straw responded more to urea molasses treatment . Key words: Effect, finger millet straw, lowland Bamboo leaf, sheep, urea molasses