Abstract: Objective: The study was aimed to determine the effect of different protein level toward the growth performance of male Bali cattle fattened in smallholder farms. Materials and Methods: The male Bali cattle used were 18 heads aged 2-2.5 years with initial body weight of 229.86±12.46 kg. The cattle were randomly divided into three treatment groups. The group of T0 given feed in accordance traditional practices of fattening cattle by farmers, T1 group given ration of 12% Crude Protein (CP) and 72% Total Digestible Nutrients (TDN) and T2 group given ration of 15% CP and 72% TDN. The cattle were fed individually for 90 days and drinking. The data collected were analyzed by one-way analysis of variance. Results: The results showed that the intake of Dry Matter (DM), CP, Crude Fiber (CF) and TDN of T1 was higher (p<0.05) from T2 and T0. Similarly, T2 group was higher than T0. The digestibilities DM and CF of group T1 and T2 did not significant but were higher (p<0.05) than T0, while the digestibility of CP of T0, T1 and T2 were not significant. The daily body weight gain of T0 and T2 were not significant but lower (p<0.05) than T1, while the Feed Conversion Ratio (FCR) were not significantly different among the group cattle. Conclusion: The traditional practices of male Bali cattle fattened on smallholder farms did not have a positive impact on improving the performance of the cattle. Male Bali cattle fattening fed ration with composition of 12% CP and 72% TDN showed intake, nutrient digestibility and growth performance that was higher compared to the other treatments. The use of ration with 15% CP and 72% TDN had no positive effect on the cattle performance. Paying attention to balancing and adequacy of protein and energy of feed was an important factor, because it proved can be improving performance of the male Bali cattle fattened in smallholder farms.