The research includes an analytical study of long term pumping test with observation wells to get the optimum determination of the most important hydrogeological parameters of confined aquifer in Banyas, by pumping from a well with average pumping rate 10104m3/day for 36 hours and only 5 hours of complete recovery groundwater level. This test is accompanied by measuring the variations of the groundwater levels in the monitoring wells. Analytical methods of steady- unsteady of groundwater flow are used to evaluate the long term pumping test, and then to determine the optimum evaluation. The Transmissivity of the confined aquifer is about 5000 m2/day (very high potential), and the storage coefficient is 1,8.10-4. Then they used to predict the groundwater drawdown during one day. So, we can get 20000 m3/day from the aquifer and the drawdown not more than 1,75 m as quasi-steady drawdown at distance 500 m from the pumping well.