The lightweight and fluffy meltblown bicomponent material produced by meltblowing and air-laid processes using polypropylene (PP) and polyester (PET, PBT) forms a unique three-dimensional network structure, which is used in automotive sound absorption, industrial and civil thermal insulation and other fields. Sound-absorbing materials have the advantages of being soft, thin, fluffy and having excellent sound absorption effects. They are suitable for use in automobiles, high-speed trains, yachts, household appliances, office equipment and other occasions. In addition to being soft and warm, thermal insulation materials also have the advantages of not getting moldy, good air permeability and moisture resistance. They can also be applied in clothing and accessories, industrial thermal insulation and pipeline cold protection, etc.