Abstract: The present invention relates to a method for preparing insecticidal textiles, which is characterized in that, by depending on the dyeing mechanism, synthetic fabrics or yarns are dyed with pyrethroids by an exhaust dyeing or a pad dyeing process. The said synthetic fibre fabrics include multifilament, monofilament, and/or staple yarn fabrics of polyester, polyamide, polyurethane, polypropylene, polyethylene, polyacryl-nitrile, or polyvinyl chloride, and their blended or interlaced fabrics with natural fibers. The said yarns are multifilament, monofilament, and/or staple yarns of the above fibers or their blended and interlaces yarns with natural fibers.