Abstract：This paper adopts the “Single factor analysis and multifactor comprehensive mapping method” proposed by professor Feng Zengzhao，and compiles the lithofacies paleogeographical maps taking the Age as the mapping unit of the Middle Cambrian of Henan，and approaches the distributive conditions of the sea and land and their evolutionary pattern.During the Maozhuang Age， there was the Xionger Land in the southwest part of the North China Platform，the platform appeared as the mud flat and inter-flat restricted sea.The mud flat was Yu-Lu-Wan（an abbreviation of Henan，Shandong and Anhui Provinces）Mud Flat and while the inter-flat restricted sea was the southeastern part of Jin-Yu（an abbreviation of Shanxi and Henan Provinces）Restricted Sea，in which one penebank and two embryo banks were scattered.During the Xuzhuang Age，no obvious changes occurred on the Xionger Land，but the North China Platform was differentiated.The Yu-Lu-Wan Mud Flat reduced in area to be a narrow and long Jin-Yu-Wan Mud Flat，and the Jin-Yu Restricted Sea extended southeastward，becoming the Yu-Lu-Wan Restricted Sea，where three penebanks and five embryo banks were distributed.To the west side of the Xionger Land， the mud flat changed to be the margin of Yu-Shaan（Shaan is the abbreviation of Shaanxi Province）Restricted Sea，where an embryo bank were occurred.Up to the Zhangxia Age，the Xionger Land was reduced in area gradually，at the same time in the North China Platform, the mud flats nearly disappeared，and the whole marine area became the united North China Continental Sea，and to be vast carbonate platform in which the oolitic banks were widely distributed，including eight banks，two penebanks and three embryo banks.From the Maozhuang Age to the Zhangxia Age，in the North China Patform the gradual spreading and reducing of the Xionger Land was associated with the area of the mud flats gradually reducing，while the restricted sea spreaded southeastward firstly and then westward and southward，and finally occupied the whole sea area.
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