The purpose of this research was to determine the influence of energy-protein ratio of complete feed made from palm oil waste towards undegraded dietary protein and digestible protein in vitro. This research was done with a completely randomized design of three treatments and five replications. The treatments research were T1 (TDN 60%, CP 12%), T2 (TDN 63%, CP 12%), and T3 (TDN 66%, CP 12%). Data were analyzed with ANOVA test, if effect of the treatment was significant (p<0,05), it would be continued with Duncan Multiple Range Test (DMRT). The results showed that level energy protein ratio of complete feed made from palm oil waste significantly (p<0,05) increasing value of UDP however digestible protein was not affected. The average value of UDP on T1, T2 and T3 were 30,06; 31,09 and 32,18%, respectively, whereas, the digestible protein were 65,31: 66,31 and 67,59%, respectively. The conclusion, the complete feed made from palm oil waste with level energy protein ratio 5,5 (CP= 12%, TDN 66%) resulted the best UDP and quality digestible protein.