Abstract: To meet the demand for miniaturization, high integration, and high performance in radio frequency (RF) front-end components of wireless communication systems, this paper proposes a design for a fully lumped-element filtering power divider based on a novel hybrid isolation network. Centering on a lumped-element filtering path, the design innovatively incorporates a hybrid isolation network structure. This approach significantly enhances port isolation while maintaining excellent filtering selectivity and power division functionality. Furthermore, the device was fabricated on a high-dielectric-constant ceramic substrate to achieve substantial size reduction.Measurement results demonstrate that the filtering power divider operates at a center frequency of 2.35 GHz, with a passband covering 2.09 GHz to 2.61 GHz. Two transmission zeros appear outside the passband, and the insertion loss at the center frequency is merely 4.32 dB. Port isolation within the passband exceeds 20 dB, while stopband suppression surpasses 20 dB at 6.87 GHz. The overall device dimensions are only 4.2 mm × 5 mm. The measured data align closely with simulation results. Combining superior filtering, power division, and isolation performance with a compact footprint and ease of integration, this device offers a novel and efficient solution for the miniaturized design of modern microwave RF systems.