It is a mesh cell structure made of high-strength HDPE broadband and strong welded. It can be expanded and contracted freely, can be folded up during transportation, and opened and filled with earth, stone or concrete materials during use, forming a strong lateral restriction And the structure of high rigidity. It can be used as a cushion to treat weak foundations to increase the bearing capacity of the foundation, it can also be laid on a slope to form a slope protection structure, and it can also be used to build a retaining structure.