Melanosis formation in the Meat of Clanis Bilineata Larvae (MCBL) treated with Na_2SO_3 in combination with Ascorbic Acid (AA) was monitored during frozen storage of 6 months. No melanosis occurred in MCBL when the meat was treated with 0.05% Na_2SO_3 in combination with 0.04% AA (p<0.05). Total viable number of Mesophilic and psychrophilic bacterial in MCBL treated with Na_2SO_3 (0.05%) in combination with AA (0.04%) decreased, while that in the control MCBL increased. Results indicated that the treatment developed in this study was a promising way to preserve MCBL during extended frozen storage.