A　new　supramolecular　self-assembly　[Li(H2O)(2)](2)[(H2O@Me10CB[5][PtCl6]center　dot　7H(2)O　(1,　Me10CB[5]　=　decamethylcucurbit[5]uril),　has　been　successfully　constructed　with　Me10CB[5]　and　[PtCl6](2)-anion　in　the　presence　of　lithium　cation　(Li+).　Single-crystal　X-ray　diffraction　study　reveals　that　compound　1　crystallizes　in　monoclinic　space　group　P2(1)/n　with　a　=　11.1681(18),　b　=　28.5425(4),　c　=　18.9342(3)　angstrom,　beta=　99.0143(15)degrees,　V　=　5961.02(16)　angstrom(3),　Z　=　4,　F(000)　=　3224,　mu　=　2.714　mm(-1),　R　=　0.0470　and　wR　=　0.1076　(I　＞　2　sigma(I)).　In　the　supramolecular　self-assembly,　two　of　the　portal　carbonyl　oxygen　atoms　of　Me10CB[5]　are　coordinated　to　Li+　cation,　yielding　a　＂half-open＂　molecular　capsule.　Then　adjacent　molecular　capsules　are　connected　with　each　other　through　hydrogen-bonding　to　form　a　one-dimensional　(1D)　supramolecular　chain　structure.　The　[PtCl6](2-)　anions　are　fixed　on　one　side　of　the　1D　supramolecular　chain　through　supramolecular　interactions.　The　thermal　stability,　electronic　valence　and　morphology　of　compound　1　are　also　investigated.