Abstract: Nutrition plays a pivotal role in sericulture by improving the commercial characters of silkworm. Silkworm being a monophagous insect derives almost all the nutrients required for its growth from the mulberry leaf itself. Amway is the best supplement protein for the production of good qualified cocoon and silk. The nutrition of Amway for the mulberry influence the larval growth of silkworm which ultimately reflect in the economic traits. The influence of Amway nutrilite, protein supplement enrichment with mulberry leaves on the energy budget and economic characters of the silkworm Bombyx mori L. was traced. Larvae fed with mulberry leaves enriched with Amway protein showed significant enhancement in larval weight, cocoon weight, shell weight, shell ratio, filament length, filament width, denier and fibroin content. Amway protein with a concentration of 10% was very effective, when compared to control. Mulberry leaves treated with Amway protein (10%) fed larvae recorded a maximum cocoon length (3.69±0.12), cocoon width (1.98±2.4) shell ratio (18.25±0.14) filament length (888±7.2) filament weight (3.2±0.57) Denier (2.87±0.02) and fibroin content (43.99±0.02). Shell ratio in this treatment (10%) showed an increase of 9.38% over control, filament length 21.64% of increase over control and denier 76.07% increase over control. Various growth parameters like Relative Consumption Rate (RCR) Relative Growth Rate (RGR), weight gain, Approximate Digestibility (AD), Efficiency of Conversion of Digested Food (ECD) and Efficiency of Conversion of Ingested Food (ECI) were enhanced by the Amway supplementation. Amway Nutrilite is a protein supplement and it contains a balanced amount of important amino acids. The present study was therefore undertaken to study the effect of Amway protein on the quantitative traits and energetics of B. mori.