The effects of mulberry leaves enrichment with ARI POIVIT on biological and physiological parameters, and ‎economic characters of silkworm Bombyx mori L. were studied. The eggs of bivoltine hybrid silkworm (103×104) ‎were obtained from Iran Silkworm Research Center (Rasht, Iran), and reared in the Dezful Plant Protection ‎Labratoary under standard condition 25°C with RH of 75 ± 5% and photoperiod of 16L: 8D.‎‏ ‏The different ‎prepared concentrations of Ari Polivit (0.25, 0.5, 1 and 2 g/L) were then sprayed onto fresh mulberry leaves and fed ‎to larvae from the beginning of the 4th instar to the end of the 5th instar, once a day except during molting. One ‎batch (250 larvae) of silkworms was fed with leaves sprayed with distilled water (distilled water control). The ‎experiment was accomplished using a completely random design with three replications for each treatment and ‎using 150 silkworms per replication.‎‏ ‏Some biological and economic parameters including Cocoon, pupa and cocoon ‎shell weights, Cocoon shell percentage, Effective rate of rearing and number of egg production were measured by ‎using standard techniques in sericulture for both sexes. Results showed that enrichment of mulberry leaves with ARI ‎POLIVIT had significant effects on biological parameters and economic characters in 0.5 g/L treatment groups for ‎females compared with controls. According to the results of this investigation, mulberry leaves enrichment with ARI ‎POLIVIT could increase egg production in 0.5 g/L concentration‏ ‏‎ significantly compared with control, while ‎effective rate of rearing recorded in 2 g/L concentration, then they can recommend for enrichment of mulberry ‎leaves for increase of farmer income.‎