In this research, an attempt has been made to describe the processes, the degree of salt water infiltration, the mechanisms of salinity or desalination of underground water, the determination of the depth, the location of the polluting zones and other possible factors affecting the salinity of the Khanmirza aquifer. In order to identify the polluting zones, the mechanism and processes of rioting in the region, 3581 magnetometer stations on the salt dome outcrop and Khanmirza plain, 235 electric soundings and also 71 samples in two wet and dry seasons (1399_1400) to measure heavy metals and anions. and cations were removed in the studied range. Two anomalies were identified using magnetometric surveys: 1) Salt dome in the southeast of the plain. 2) A possible salt bed in the center of the plain. The salt dome has intrusive igneous masses, which is one of the possible sources of heavy metal pollution in this aquifer. The depth of the intrusive masses in the "Adame Farasu" map is about 150 meters. In this research, the limits of the salt dome were determined and it was found that it does not extend below the aquifer. Magnetometry, resistivity and hydrogeochemical analyzes are in good agreement with each other and all indicate the presence of a polluting zone in the center of the plain (dried swamp). According to the results obtained from the resistivity surveys in the center of the plain, there is a zone with low resistance, which is caused by the brines of the saline bottom of the aquifer. In the past, the brine from the salt dome was drained in the center of the plain and probably formed a salt flat. The results showed that the salinity in the aquifer of Khanmirza plain increases from 91 to 9070 microsiemens per centimeter, from the center of the aquifer to the periphery of the plain. The hydrogeochemical facies of the examined water sources vary from Ca-HCO3 to Na-Cl in fresh water to salt water. The most important source of the salinity of the brines is the dissolution of halite and gypsum, which is confirmed by the combined graphs of Cl/Br, Na/Br, I/Cl, Na/Cl and Li/Cl against Br/Cl. Also, the groundwater samples taken from the aquifer were placed above the evaporation line of sea water in the Br/Cl diagram, which represents the mixing and dilution process. As a result of germological results, hydrological studies, hydrogenial and geophysical data, the subcontaining of the underground water of the plain of Khanmirza, They are combined with the fresh water sources of the aquifer and after the aquifer becomes saline, they move towards the lowest level of the reservoir (northeast of the range) due to the existence of a hydraulic slope.