Abstract: Larva of Chrysopa pallens (Rambur) were fed with capsule artificial diet based on the defatted-powder of housefly larva. On this diet, larval development period was 13.7±0.5 d, larval survival rate, 96.7%, adult eclosion rate, 65.5%, and pupal weight, 20.1±1.6 mg. Activities of three main digestive enzymes in the midgut of the third instars of C. pallens were detected to exam the effect of the artificial diet. Activity of protease was 3.88-folds higher in the larvae fed with artificial diets than in those fed with aphids, activity of trehalase was also 0.65-folds higher in the former than in the latter, while activity of lipase was lower in the former than in the latter by 0.46-folds. These findings indicate that the dietary protein was too high, while the fat was a little lower, which may help further improvement of the artificial diets for C. pallens.