The utility model relates to leak-proof, penetration-proof non-woven fabrics which are mainly used for making the lining of down coats and down quilt, and also can be used for making one-off products such as surgery clothes and protective clothes. The utility model is formed by combining an upper non-woven cotton net 1, a lower non-woven cotton net 3 and a plastic thin membrane layer 2 which is arranged between the upper non-woven cotton net 1and the lower non-woven cotton net 3. The utility model has the advantages of preventing down feather from penetrating, covering the unpurified color of the inner layer, soft, warm, good water proof, alcohol resistance and blood plasma penetration-proof capability, and being capable of preventing germ and virus from intruding.