Background:　Hearing　impairment　(HI)　is　a　common　sensory　deficit　with　considerable　impacts　on　social　well-being　(SWB)　in　adults.　Evidence　on　the　effectiveness　of　auditory　rehabilitation　and　hearing　health　education　in　the　social　domain　of　health　for　individuals　with　HI　is　scarce.　Objective:　This　study　aims　to　test　the　feasibility　and　efficacy　of　providing　free　hearing　aids　or　a　combined　offline　and　online　hearing　health　education　intervention　on　social　isolation　and　functioning　among　Chinese　adults　with　HI.　Methods:　This　study　is　a　3-arm,　single-blinded,　randomized　controlled　trial　(RCT)　with　a　follow-up　at　24　months　after　the　baseline　study.　A　total　of　435　participants　aged　18　years　and　older　with　some　degree　of　HI　will　be　recruited　and　randomly　assigned　to　2　intervention　groups　and　1　control　group.　Free　hearing-aid　provision,　as　well　as　a　hearing　health　education　program　that　is　combined　with　online　and　offline　lessons,　will　be　implemented　in　2　intervention　groups,　respectively.　The　control　group　will　not　receive　any　intervention.　The　primary　outcomes　include　social　isolation　and　functioning　in　society.　The　secondary　outcomes　include　social　engagement,　a　sense　of　mastery,　self-efficacy,　psychological　resilience,　chronic　diseases,　life　satisfaction,　hearing　health　literacy,　and　hearing　care　usage.　Results:　Participants　were　recruited　for　hearing　tests　in　September　2022,　during　which　baseline　results　were　collected　through　in-person　interviews.　Follow-up　interviews　were　conducted　in　September　2024.　The　primary　analysis　will　use　ANOVA,　linear　mixed-effects　modeling,　structural　equation　modeling,　and　cost-effectiveness　analysis.　Conclusions:　The　findings　of　this　study　will　provide　evidence　for　the　impact　and　cost-effectiveness　of　a　community-based　auditory　or　hearing　health　education　intervention　on　SWB　among　Chinese　adults　with　HI,　which　may　contribute　to　promoting　hearing　health　and　reducing　adverse　health　consequences　in　an　aging　society.　©Jiamin　Gao,　Yuying　Zhang,　Xiaqing　Jiang,　Zhenjing　Fu,　Haochen　Jiang.