Salt slurry is the solid waste of the salt industry. The study object is the salt slurry before filter in Jianghan Salt & Chemical Complex. This study investigates the application of the salt slurry in Talimu unsaturated brine-based drilling fluid of the carboniferous system in laboratory. It indicates that on the premise of the same density and pH value as the basic drilling fluid recipe, when the salt slurry dosage was less than 500 kg/m3, all the salt slurry application-based recipes measured up both the rheology behavior and the filtrate loss of the drilling fluid. This investigate will reduce the cost of the drilling fluid with the salt slurry as a resource.