Solar-driven　interfacial　evaporation　technology　has　immense　potential　in　addressing　the　global　challenge　of　freshwater　scarcity.　Currently,　most　solar　interface　evaporators　have　complex　and　costly　manufacturing　processes,　hindering　practical　applications.　Additionally,　in　many　solar　distillation　systems,　the　evaporation　and　condensation　processes　occur　within　the　same　space.　This　causes　sunlight　to　be　scattered　or　absorbed　by　the　water　droplets　on　the　transparent　surface,　thereby　reducing　the　solar　energy　reaching　the　evaporator,　the　high　internal　humidity　ratio　further　hinders　water　evaporation.　Therefore,　we　developed　a　cost-effective　polyvinyl　alcohol/carbon　black　hydrogel　(PCH)　with　a　simple　fabrication　process.　PCH　achieves　an　evaporation　rate　of　1.54　kg　m(-　2)　h(-1)　and　an　energy　conversion　efficiency　as　high　as　90.5　%　under　1　sun　(1　kW　m(-　2)).　Furthermore,　we　have　introduced　a　novel　solar-driven　low-vacuum　interfacial　distillation　system　(SLIDS)　that　separates　the　evaporation　and　condensation　processes　into　distinct　spaces　and　employs　the　principle　of　low　pressure　to　enhance　water　evaporation.　The　condensate　yield　rate　of　the　SLIDS　was　1.46　kg　m-　2　h-1,　which　is　2.2　times　higher　than　traditional　system　under　1　sun.　This　increase　in　the　condensate　yield　rate　by　41.6　%　was　achieved　through　the　introduction　of　low-pressure　conditions.