By feeding the host, Spodoptera litura Fabricius, larvae with artificial diets treated with different concentrations of zinc for 4 generations, the side effects of zinc oil the survival and development of Microplitis bicoloratus Chen, a larval parasitoid of S. litura, were estimated. The results indicated that the zinc contents of S. litura hemolymph increased with the increase of zinc concentrations in diets and generations of the phytophagous insect. The parasitism rate, time from parasitism to pupae, pupal duration adult emergence rate, and adult female longevity of M. bicoloratus wasp were influenced to some extent. Specially, the adult emergence rate of the first generation and the parasitism rate of the second generation decreased significantly with the increase of the zinc concentration in their host diets. It was so concluded that high dose zinc in the diet of herbivorous insects affected the survival and development of their larval parasitoid M. bicoloratus through food chain to some extent. none