The supply and demand of feed resources in China appear the phenomenon of lack of concentrate feed, protein feed, green feed and insufficient total resources, especially the serious shortage of protein feed. Cnidoscolus aconitifolius and hybrid Broussonetia papyrifera, as two new and high quality woody protein feed resources, have high potential for feed production. In this study, C. aconitifolius and hybrid B. papyrifera were taken as the experimental objects to determine the conventional nutrutional components, mineral elements and amino acid components. The comparison results were performed by t test and the feeding values of the two woody fodder plants were evaluated combined with relative feed value (RFV). The results of analysis showed that the crude protein (CP) content of C. aconitifolius and hybrid B. papyrifera was more than 20%, the crude fiber (CF) content was less than 15%, the mineral element content such as Ca, P, K, Mg, Fe and Zn was high. Among them, the Ca/P ratio of C. aconitifolius was 1.82∶1, which met the requirement of Ca/P ratio in general feed, while the Ca/P ratio of hybrid B. papyrifera was 8∶1, which was far greater than that in general feed. The essential amino acids (EAA)/non-essential amino acids (NEAA) and essential amino acids (EAA)/total amino acids (TAA) in both C. aconitifolius and hybrid B. papyrifera was above 60% and 40%, respectively. The variety of limiting amino acid (LAA) and sulfur-containing amino acids was comprehensive and rich in content. The evaluation results of C. aconitifolius and hybrid B. papyrifera combined with the relative feed value (RFV) showed that C. aconitifolius was super grade forage material and hybrid B. papyrifera was senior grade forage material, both had good overall effect and high feeding value. The results of comparative analysis on nutritional value of C. aconitifolius and hybrid B. papyrifera showed that both belonged to high-quality woody feed raw materials rich in protein, minerals and amino acids, had high feeding value and development potential in livestock diets. In particular, C. aconitifolius had higher CP content, lower CF content, lower NDF content and more reasonable proportion of calcium-phosphorus ratio, which had better feeding value compared with hybrid B. papyrifera.