①　Best strength-weight ratio:because the honeycomb core can supply continuous support to the panel,the panel can make full use of its function of resistance on pull or compression. ②　Best rigid -weight ratio :for a main structural member to bear bending,the right panel and honeycomb should be chosen to reach the best rigid-weight ratio. ③　Good thermal and sound insulation performance:because the volume of physical materials is 1-3% in the honeycomb core of sandwich panel,the other space air is in the closing condition,the air have provided good thermal and sound insulation performance to prevent the thermal and sound from transferring.Therefore,although the honeycomb core don't have the performance of thermal and sound insulation,but the honeycomb sandwich panel is provided with good thermal and sound insulation performance. ④　Good shock absorbing performance:there are many concentrated cells,which are like many small H-beams to scatter different direction pressure,in the honeycomb to supply better shock absorbing performance.