The utilization of silicon-based slot waveguide structures has garnered significant attention in recent years, particularly in the context of multimode interference couplers (MMIs). In this paper, we present the design of 1×2 parabolic multimode interference power splitter. The coupling zone is set to a parabolic structure, a tapered waveguide is used at the input/output of the coupler. An unequal-width design is used for tapered waveguide at the output, to reduce excess loss. The device is simulated using eigenmode expansion (EME) method. The presented results signify that the device can be fully applied in the C-band and the excess loss is only 0.036 dB, it has better characteristics and can be used in optical network systems.