What　mechanisms　caused　the　formation　of　the　Keluke　-　Tuosuo　Lakes　is　still　not　known　clearly,　due　to　the　lack　of　deeply　and　systematic　studies.　To　understand　the　geological　background　and　evolution　of　the　Keluke　-　Tuosuo　Lakes,　the　field　geomorphology　and　geological　characteristics　of　Lian　Lake　area　have　been　analyzed　through　combining　with　the　seismic　data　from　oil　exploration　and　drilling.　Several　mud　volcanoes　have　been　found　in　the　area　along　Dachaidan-Tuosu　Lake　fault　zone,　which　are　obviously　controlled　by　the　active　faults.　And　then,　the　main　reasons　for　the　formation　of　the　Tuosu　and　Keluke　Lakes　have　been　discussed.　Since　the　Carboniferous　epoch,　the　Lian　Lake　area　has　experienced　several　tectonic　evolution　histories,　such　as　extension,　folding　and　uplift,　rifting,　compression　and　depression,　weak　reverse,　weak　rift　-　sagging,　depression,　and　strong　reverse.　Thus,　the　formations　of　the　Tuosuo　and　Keluke　Lakes　were　tightly　related　to　the　regional　tectonic　evolution,　especially　from　the　impact　from　the　Himalayas　since　Neogene　period.　As　the　results　of　the　magma　intrusion　and　over　thrust,　the　tertiary　strata　were　uplifted　obviously.　And　then,　the　Oulongbuluke　Mountain,　Aimunike　Mountain,　and　some　other　mountains　uplifted　significantly,　and　the　Lian　Lake　area　was　divided　into　two　parts.