Abstarct: Shahriar plain, which is one of the most important plains in the country, has suffered a severe decline due to overuse of groundwater resources. According to the analysis of water level data measured in 41 piezometers in the plain during the reference period (1363-1393), it was observed that the rate of decline is not the same in all parts of the plain. The highest rate of decline has occurred in the northern parts of the plain (Shahriar, Andisheh and Shahr-e-Quds) due to over-exploitation of the aquifer. Gradually, to the south of the plain, the rate of decline has decreased and in the southern parts (Robat Karim and Golestan counties) the decline in groundwater level has been minimized and in some places water level rise has been observed. According to the amount of the groundwater draft calculated in each of the piezometers during a period of 30 years, Shahriar plain was divided into three zones: north (high decline), central (medium decline) and south (low decline). North zone piezometers have the highest decline in the region due to the over-exploitation, agricultural activities and water transfer to the new city of Andisheh. The rate of water level decline in the piezometers of the central zone has decreased compared to the northern zone, which is due to the existence of agricultural activities and over-harvesting of the aquifer. In the piezometers of the southern zone, water level rise has been observed due to the increase in urban development, increase in groundwater recharge, severe decrease in agricultural activities and consequently decrease in groundwater exploitation. Also, studies on land use changes in this plain and its study with the rate of decline in the three zones of North, Central and South showed that there is a considerable relationship between changes in groundwater levels and how changes in land vegetation in the plain. Given that there is no clear relationship between changes in urban areas and declining groundwater levels, the main cause of declining water levels is increased vegetation. Identifying suitable points of the plain for artificial recharge, using treated wastewater for artificial recharge in the plain and various other uses, proper and comprehensive management in the operation and consumption of water resources and reducing pumping from the aquifer, especially in the northern parts of the plain to prevent further decline is one of the solutions offered.