Electricity is a form of energy that expected to be increased and grown in most industrial sectors. The Gas turbine (GT) the equipment used to convert natural gas to electricity because it is cleaner than other fossils fuels. Using a stand-alone GT has many disadvantages like the low efficiency which about 30-40 % and most importantly is the waste of energy that goes through the exhausted gases. The bottom cycle is a solution to recover this energy. Commonly, heat recovery steam generation (HRSG) is used to utilize the waste energy but using HRSG is considered not efficient although it can increase the system efficiency to 60 %. The cycle used to recover the heat is called also a bottoming cycle. Besides, the requirement of the weight and space availability in mature onshore fields and offshore fields. The sCO2 cycle is considered a promising alternative bottoming cycle due to the additional produced power and also its compactness. This study evaluates the cascade sCO2 cycle used by (Kim et al., 2017) in comparison with the traditional steam Rankine cycle. To make this comparison fear, once through (one-stage) is combined with the bottoming cycle. The base case was remodeled by Aspen HYSYS software and was validated with the existing topping cycle a bottoming cycle studied by (Følgesvold et al., 2017). The thermodynamic analysis was evaluated to show the possible increase in the produced power. the results indicate that the cascade sCO2 cycle produces higher power.