The invention relates to the technical field of environmental-protection engineering, in particular relates to a method for comprehensive treatment of kitchen waste, and is characterized in that the processing steps comprise kitchen waste pretreatment and insect abdominal conversion. The kitchen waste pretreatment process comprises automatic sorting, oil-water separation, biological fermentation, drying, steam condensation and ionization deodorization. The kitchen waste is subjected to automatic sorting, oil-water separation, biological fermentation, drying, steam condensation and ionization deodorization by devices to obtain a granular pretreated material, and the granular pretreated material is used for feeding insects and is completely converted by the insects to obtain insect frass and an insect product. Because of adopting of the method, the method has complete technology, is environmentally friendly and has no pollution during the treatment process, allows the treated material to accord with national relevant ecological standards, and has the advantages of harmless treatment, resource utilization, environmental protection, no pollution and the like.