Abstract: A raw material composition of environmental protection coffin comprises a composite material, a filling material, and an adhesive. The composite material is made of powders formed by crushing an agricultural waste. The filling material is a natural amylum material, and is used to fill gaps of the composite material. The adhesive is polyvinylalcohol, and uses water as the medium for adhesion to bind the filling material and the composite material together. A manufacturing method of an environmental protection coffin comprises the steps of: raw material baking, raw material crushing, material mixing, mold pressing, drying by air, waterproof processing, assembly, and painting.