A 32-way wideband and high-efficiency power combiner operating at the W-band is designed. The component employs a hybrid E-H plane T-junction to enhance the compactness of the power combiner. To extend the combining bandwidth, ridge waveguide transmission lines are introduced, along with multi-section impedance matching steps and gradual transitions. This structure features compactness, wideband matching, and high efficiency. To validate the proposed method, a 32-way back-to-back power combiner was fabricated and tested. Experimental results show that the structure achieves a return loss better than 15 dB, an insertion loss below 1.05 dB, a relative bandwidth of 37.8%, and a combining efficiency exceeding 78.4% across the W-band. These results confirm the effectiveness of the proposed design method, demonstrating significant application potential for multi-channel power combining scenarios.