With the industrial development, the forest area reduced gradually in China in recent years. The development of under-forest economic crops was considered as a new approach to solve this problem. Therefore, tow forage plants (Zea diploperennis and Dioscorea esculenta) were interplanted in the Camellia oleifera forest by interplanting technology of forage grass and small trees. The main nutrient contents of Zea diploperennis and Dioscorea esculenta interplanted in the Camellia oleifera forest, including moisture and volatile matter, crude ash, calcium, phosphorus, crude fat, crude fiber, crude protein, organic matter and dry weight, were determined by biochemical methods and spectrophotometry. The analytical result showed that the contents ratio of Zea diploperennis/Dioscorea esculenta about moisture and volatile matter, crude ash, calcium, phosphorus, crude fat, crude fiber, crude protein, organic matter and dry weight were 1.04, 0.49, 0.61, 0.59, 0.53, 1.24, 0.70, 1.06 and 0.99, respectively. The result indicated that the most contents of calcium, phosphorus, crude fat and crude protein of Dioscorea esculenta were higher than those of Zea diploperennis significantly, suggesting that Dioscorea esculenta had higher forage value than Zea diploperennis as interplanting under-forest forage crop.