The cationic polymer of polyquaternary ammonium salt can adsorb to the surface of clay minerals in sandstone reservoir through physical and chemical action, which has strong adsorption force, long time of stabilizing clay minerals, resistance to scouring and less consumption; resistant to acid, alkali and salt; it is insoluble in crude oil and hydrocarbon, has strong anti washing ability and won’t occur wetting reversal. It has excellent wettability, softness and film-forming, and has obvious effect on hair conditioning, moisturizing, luster, softness and smoothness. It is the preferred conditioner in two in one shampoo. It can be combined with cationic guar gum, jr-400 cellulose and betaine. It is a conditioner in shampoo. It has good compatibility with water, anionic and non-ionic surfactants. It can form multi salt complex in detergent and increase viscosity.