Abstract: Sixteen crossbred feedlot beef were selected to investigate the nutrient digestible and economical efficiency effects of three differently processed corn stalk and dry corn stalk. The animal randomly divided in to four groups including dry stalks silage, microbial fermented, ammonianized stalks and dry stalks( control group ), The digestible experiment result showed that voluntary intake of digestible organ matter was higher(p<0.05) in animals consuming treatment stalk. The nutrient digestibility of total tract were no significant (p>0.05) difference among the processed corn stalk and dry corn stalk. The growth trials beefs fed treated corn stalk diets gained faster and tended to be more efficient than those fed the dry corn stalk diets. However, the fattening result of ammonianized stalks improved beef performance and had a good economic return.