Soft-sediment　deformation　structures　(SSDSs)　are　widely　developed　in　the　lacustrine　sediments　of　paleo-dammed　lakes　in　tectonically　active　regions　and　contain　a　wealth　of　information　on　regional　fault　activity.　In　this　study,　multiple　SSDSs　(load　structures,　small-scale　slump　structures,　droplets,　diapir　and　pillow　structures,　silty-clay　pillars　and　large-scale　slump　structures)　were　identified　in　the　strata　of　the　Late　Pleistocene　lacustrine　sedi-ments　in　the　Tashkorgan　River　drainage　in　northeaster　n　Pamir.　The　deformation　mechanisms　of　the　SSDSs　were　related　to　the　liquefaction,　fluidization　and　thixotropic　behaviors.　The　regional　tectonic　settings　and　SSDS　fea-tures　point　toward　a　trigger　mechanism　with　seismic　activities　and　indicate　that　the　seismogenic　faults　were　possibly　related　to　the　southern　part　of　the　Kongur　Shan　extensional　system.　Accelerator　mass　spectrometr　y　(AMS)　radiocarbon　dating　data　showed　that　the　SSDSs　in　the　Tashkorgan　lacustrine　sediments　formed　30,221-29,932　cal　BP　and　25,825-25,317　cal　BP.　The　results　of　this　study　improve　ou　r　understanding　of　fault　activity　and　geodynamic　processes　in　northeaster　n　Pamir　during　the　Late　Pleistocene.