Based　on　the　empirical　e-lg　p　and　e-lg　kv　relations,　the　basic　governing　equation　of　one-dimensional　nonlinear　consolidation　was　derived,　taking　into　account　nonlinear　consolidation　with　variable　compressibility　and　permeability,　under　time　dependent　loading　and　the　self　weight　of　the　soil.　Five　computational　parameters　on　one-dimensional　nonlinear　consolidation　were　summarized　from　the　equation.　This　paper　presented　the　hardware　configuration　and　software　function　of　the　GDS　advanced　consolidation　testing　system　(GDS　ADVCTS),　and　emphasized　the　advantage　of　determination　of　nonlinear　consolidation　parameters　compared　with　the　traditional　testing　equipment　and　method.　GDS　system　was　used　to　investigate　the　consolidation　behavior　of　Xiaoshan　Clay,　and　testing　results　of　one-dimensional　nonlinear　consolidation　computational　parameters　were　listed　in　details.　The　nonlinear　behavior　of　compressibility　and　permeability　during　the　consolidation　of　soft　soil　was　verified.