Through the study of the stratigraphic sequence, sedimentary facies, formation age of the strata that make up Semisubmerged Yardang landform and the tectonic conditions, climate and human factors of the evolution of Yardang landform after the formation of stratigraphic in the Duck Lake area of Qaidam Basin in Qinghai Province, the formation of Semisubmerged Yardang landform in the study area is the Miocene Upper Youshashan Formation, and the ostracod assemblages indicate that the formation age is late Miocene. The analysis of sedimentary facies and sporopollen assemblages reveal that this area was warm and arid climate in late Miocene and it was covered by the ancient lake and accepted lacustrine facies and lacustrine delta front facies sedimentary. In the Pliocene, the ancient lake shrank and disappeared under the dual role of regional tectonic uplift and arid climate. Pleistocene in extreme drought and strong monsoon environments, the upper strata of the Upper Youshashan Formation was lifted up to the surface, formed Yardang landform under the action of wind erosiondominated external forces. From late Pleistocene to early Holocene due to the arrival of the last interglacial, the climate turned warm and moist, and the lake invaded to form three lakes. In recent years, the distribution pattern of lakes has been changed under the action of human activities, which presents the landscape of today’s Duck Lake. Today, the lake area of Duck Lake drowns some Yardang and becomes a peculiar Semisubmerged Yardang landform landscape.