It is mainly used in PBAT, PLA, PBS, PCL as the carrier, calcium carbonate, talcum powder, starch, bamboo powder, straw powder, rice husk powder, etc. as filling materials, which are used in biodegradable plastic products such as blown film, sheet, blister, injection mold and drawing tube. After the product is used and discarded, it can be naturally decomposed into CO2 and water under composting conditions, which is a fully biodegradable green and environmental protection material.