Abstract: The application describes a multilayer biodegradable electrically insulating composite material consisting of compressed layers of glass cloth or fiberglass pre-impregnated with a biodegradable polymer binder or alternately stacked layers of glass fiber and a polymer binder film. The developed material is close in its characteristics to the substrates of commercial printed circuit boards. Biodegradable electrically insulating composite material can be used as a substrate for creating single-sided or double-sided or multilayer printed circuit boards based on them, and can also be used to manufacture various electrical insulating materials and structures.