Abstract: [Objective]To verify the feeding effects of fermented feed prepared with palm residues in beef cattle and to provide scientific references for the development and application of the fermented feed products of palm residues.[Method]A total of 24 hybrid cattle of Charolais and local yellow cattle were selected and randomly divided into four groups.During the fattening experiment(14-16 months of age),the control group fed a basal diet consisting of roughage(100% corn stalk)and concentrate supplement,and for the experimental groups ofⅠ,Ⅱ and Ⅲ,the forage was partially replaced with 10%,20% and 30% of fermented feed prepared with palm residues,respectively.The growth performance,healthy status and breeding economic benefits were analyzed to evaluate the application effect of fermented feed prepared with palm residues in beef cattle.[Result]The feeding effect of the diet in which the corn stalk was partially replaced with 10%,20% and 30% of fermented feed prepared with palm residues was similar to that of the diet containing 100% corn stalk.The survival rate of the hybrid cattle in experimental groups and control groups were all 100% and had a good healthy status.The best breeding economic benefits were obtained in experimental group Ⅲ,followed by experimental groupⅡ,experimental groupⅠand the control group.[Conclusion]Feeding the diet containing fermented feed prepared with palm residues reduces the breeding cost and improves the economic benefits in beef cattle.