A new type of lactic acid bacteria fermentation agent consists of four strains selected from several strains of lactic acid bacteria. This new type of composite lactic acid bacteria starter cultures produced by lactic acid bacteria fermentation of LAB EPS improve viscosity,stability and taste of the product,which will replace the traditional addition of stabilizing agent into the product,thereby it can not only reduce the cost of the products,but also improve the product quality and safety,thus extend the shelf life of the product. It provides a new way for the application of nisin.