The invention provides various skin mucous membrane disinfectants which are prepared by adopting double-chain quaternary ammonium salt and benzalkonium bromide (C20H40BrN) as main germicidal ingredients and using triclosan (C12H7Cl3O2), polyethylene glycol (HOCH2(CH2OCH2)nCH2OH), glycerol (C3H8O3), Tween 80, menthol, borneol, medical alcohol and the like as adjuvant ingredients, can be used in thefields such as the disinfection of skin and mucosa, the disinfection of surgical hand washing and the disinfection of medical apparatus and instruments in the hospital, the disinfection of tools anddevices in public places and different production industries, the mold prevention of industrial products and agricultural grains, the health disinfection of poultry houses, the aquatic product field,the aquaculture, the killing of alga, the preparation of plastic antibacterial agent, the preparation of compound disinfectant and the like and has effective bactericidal action to staphylococcus aureus, colibacillus, candida albicans, HIV and the like ; in addition, the preparation method is simple and the production cost is lower.