Abstarct: The studied area is located in Inche region in the north of Agh Qalla city, located in the north of Golestan province. This area is located between Gorgan River in the south and Atrak in the north, and the heights of Aghband-Dagh in the east and the coast of the Caspian Sea in the west. In this research, The water and salinity origins of deep capped aquifer in Inche region located in the Apsheron and Agchagil formations has been investigated using hydrogeology, hydrochemistry and isotopic methods. For this purpose, sampling was done from 14 brine production deep wells with an average depth of 800 to 1000 meters and 7 rainfall samples from the study area, as brine injection well, Neftiliche Geyser and Alagol lagoon (fresh water) in the study area and various parameters including electrical conductivity (EC), pH, major ions, heavy mextals and stable isotopes have been measured. The water level in the eastern part is from -28 meters below the sea level to -37 meters in the western part in the study area. The general direction of water flow in the deep capped aquifer is from the east to the west, which is aligned with the surface and shallow groundwater flow direction. Due to the pumping of brine by a number of wells, a drop cone has been created locally within the boundaries of both mines. The transferability value in the deep capped aquifer of the studied area is about 10 m2/d, the hydraulic conductivity (K) is about 0.1 to 0.5 m/d, and the storage coefficient varies between 10-5 and 10-7. The pH of the samples was between 6.7 and 6.9, which are in the natural range. The temperature of brine in the studied area varies between 30 and 35 oC. The electrical conductivity in the studied area is varied between 122,000 to 149,000 μS/cm. The saturation profiles of the samples are saturated to supersaturated with respect to calcite and dolomite and under saturated with respect to gypsum and halite. baxsed on the isotopic data of precipitation in the study area, the local precipitation line has been obtained as δ 2H=8* δ18O- and the precipitation-altitude relationship has been obtained as δ 18O=- Elev.(m)-4.42. The slope of the precipitation line is equal to the slope of the global and Mediterranean lines, which is indicates that precipitation occurred in wet weather conditions. The amount of d-excess in the studied area is completely different and lower than the Global and Mediterranean water lines. All the samples of the studied area except Neftiliche Geyser have the same origin and have Cl-Na type. The hydro chemical-isotope results show that the main and primary origin of the deep capped aquifer in the study area is the evaporated old sea water in the lagoon environment. The concentration of some elements has changed over time during secondary processes such as ion exchange, membrane filtration, etc. The deep capped aquifer of the studied area can be the result of mixing between an brine with the origin of evaporated old sea water and atmospheric water of the area.