<p>Solar-driven interfacial evaporation provides a sustainable solution to freshwater scarcity. However, its practical use is hindered by salt crystallization, the mechanical fragility of existing evaporators, and the substantial low-grade heat generated during evaporation, which is seldom utilized. Herein, drawing functional inspiration from the efficient mass-transport characteristics of the lotus root, we design a biomimetic polymerized high internal phase emulsion (PolyHIPE)-hydrogel composite (SH@FPCP) featuring an interpenetrating network. The interconnected macropores act as rapid vapor-escape pathways, while hydrogel filaments threaded through the pores continuously replenish water and dissolve accumulating salts. The fluorinated polypyrrole-modified PolyHIPE framework provides a strong photothermal response under solar irradiation. The SH@FPCP evaporator delivers a high evaporation rate of 3.19 kg·m⁻²·h⁻¹ with stable salt-resistant operation for over one week. The compressive strength increases to 1298 kPa at 5% strain, highlighting substantial mechanical reinforcement compared with the unmodified hydrogel. Moreover, the SH@FPCP evaporator enables thermoelectric power generation, delivering a power density of 720 mW·m⁻² and an open-circuit voltage of 110 mV. This study provides a novel material design strategy for developing durable and high-performance solar evaporation systems.</p>