The purpose of this experiment was to determine nutrient contents of seven common energy feeds (corn, wheat bran, wheat, barley, brown rice, corn bran, sorghum) for semi-fine-wool sheep by using the feed proximate analysis, and to measure digestible crude protein contents (DCP) contents and effective energy values by digestion and metabolism experiments combined with the substitution method. Sixteen Yunnan semi-fine-wool sheep with an average body weight of (55.61±5.33) kg were selected in the experiment and were randomly divided into 4 groups with 4 animals in each group. The experiment included two periods. There were eight diets including one basal diet and seven experimental diets, and four diets of them were fed in each period. Each period experiment lasted for 10 d including a 5-day preliminary trial period and a 5-day formal trial period. The results showed as follows:1) the crude protein (CP) content of wheat bran and corn bran was relatively high, which was about 16%, the CP content of sorghum, wheat, brown rice and barley was 10% to 14%, and the CP content of corn was the lowest, which was 8.63%. The crude fiber (CF) content of wheat bran and corn bran was 8.74% and 13.77%, respectively, and the CF content of other energy feeds was below 4%. The neutral detergent fiber (NDF) content of corn bran was the highest, which was 58.71%, followed by wheat bran, which was 36.37%, the NDF content of barley was 24.43%, the NDF content of sorghum, wheat and corn was 11% to 16%, and the NDF content of brown rice was the lowest, which was 6.54%. The acid detergent fiber (ADF) content of wheat bran and corn bran was 10.93% and 16.28%, respectively, and the ADF content of other energy feeds was below 5%. Among all energy feeds, the ether extract (EE) content of corn was the highest, which was 4.11%, and brown rice had the lowest EE content, which was 1.16%. 2) The DCP content of energy feeds was 38.49 to 130.29 g/kg. The DCP content of corn bran, barley and wheat bran were higher, which were 130.29, 117.50 and 114.16 g/kg, respectively, and the difference in DCP content of the three feeds was not significant (P>0.05). The DCP content of corn was the lowest, which was 38.49 g/kg, and was significantly lower than that of other energy feeds (P<0.05). The DCP contents of brown rice, wheat and sorghum were medium, and the values were close (P>0.05). The digestive energy (DE) and metabolic energy (ME) were higher in sorghum, brown rice and corn, and there was no significant difference among the three feeds (P>0.05), among which the highest DE and ME of sorghum were 17.76 and 15.46 MJ/kg, respectively. The DE and ME of wheat, barley and corn bran were medium, and the DE and ME of wheat bran were the lowest, which were 13.83 and 11.25 MJ/kg, respectively. In conclusion, the data about nutrient contents of common energy feeds for semi-fine-wool sheep are somewhat different from the values of Tables of Feed Composition and Nutritive Values in China (2017). Therefore, in practice, accurate determinations of nutrient contents of feeds must be performed one by one to precisely formulated diets. In terms of the quality of digestible crude protein, corn bran has the best quality, followed by barley and wheat bran, followed by brown rice, wheat and sorghum, and the quality of corn is the worst. From the perspective of energy quality of energy feeds, the quality of sorghum, brown rice and corn are higher, wheat, barley, and corn bran are poor, wheat bran is the worst.