It can be used for waterproof and oil proof finishing of various fabrics. By changing the composition of the fiber surface layer, and firmly adhering to the fiber or combining with the chemical fiber, the fabric is not easy to be wetted by water, oil and other stains, giving the fabric excellent water and oil resistance, which can reach Grade IV and Grade VI respectively. The C6 waterproof and oil repellent agent has no adverse effect on the finished fabric, and does not affect its original permeability and feel; Good washability, the fabric is still excellent in water, oil and dirt resistance after repeated washing; Good compatibility, can be used in the same bath with softener and other finishing aids; Safety and environmental protection, excluding PFOA and PFOS (the content is lower than the detection limit value), in line with export standards.