Submersible pump for wastewater are used in sewage systems, septic tanks, and reservoirs. Submersible pumps have become an issue because of environmental pollution. Pump clogging often occurs when various solid materials or contaminants are introduced into the pump. This often causes a failure of the underwater pump. For this reason, cutting and passing type impeller is used for minimizing breakdowns and enhancing durability. In this study, we compared cuting and passing type impeller with the suction modification model. Numerical analysis was conducted through the CFX program. The flow characteristics of velocity and Static pressure distribution were obtained through the analysis, The performance characteristics were compared with experimental data.