Increasing egg production is a necessary demand for silkworm rearing continuity in Egypt. Flaxseed plant has a compound that mimics estrogen hormone in vertebrates. Emulsions contain micro particles prepared from flaxseed oil were used in the present study as an exogenous source of phyto-estrogen. Micro particles size were measured by Zeta sizer and ranging from 1053 to 4087 nm with percentages 33.4 and 66.6 %, respectively. Fifth instar larvae were topically applied with flaxseed micro particles emulsion with three concentrations (0.25, 1 and 3 %) in addition to control every 48 hrs. The present study clarify that, 0.25% concentration have a tremendous effect on egg production and cocoon characters. As well as observations related to insect performance revealed maximum larval weight, effective rate of rearing (ERR), pupation percentage, pupal weight comparing with controls. On the other hand, deleterious effect was observed for concentrations (1 and 3%). Antioxidant activities were estimated by 2,2-diphenyl-1-picrylhryl free radical (DPPH^*) scavenging activity reagent and the highest activity was recorded for 1 % treatment 36.947 %.