Method for extracting chitin and antibacterial peptide from fly larvae

The invention belongs to the field of product extraction technology and relates to a method for extracting chitin and antibacterial peptide from fly larvae. The method comprises the following steps of: firstly disinfecting and rinsing fresh fly larvae to be clean, then extruding the cleaned fly larvae to separate the fly larvae skin from visceral mass serous fluid; firstly soaking with hydrochloric acid solution, drying after washing, and then soaking with NaOH solution to remove protein; retaining residual liquid, drying after cleaning, adding the NaOH solution after crushing, carrying out water bath at the temperature of 98 DEG C, and heating for reaction; putting chitosan into acetic acid solution, stopping reaction after the chitosan is dissolved, filtering, cleaning, drying at the temperature of 50 DEG C, and obtaining the chitosan; and then adding acetic acid into the visceral mass serous fluid of the fly larvae, homogenizing, standing over the night at the temperature of 4 DEG C, filtering, adsorbing t