for green building materials is rising sharply, especially insulating materials from renewable resources [1]. It is well known that agri-cultural straws (such as rice straw, wheat straw and so on) have been used as building insulation material for a long time due to their hollow structure, low density and outstanding characteristics of heat insulation. It has reported that typical thermal conductiv-ity values for cellulose insulation materials are between 40 and 50 m W/(m K)