The field investigation, remote sensing image interpretation and comprehensive analysis of meteorological data were used to analyze the coupling relationship between wind field and sedimentary system. The analysis results show that the change of wind field is not only controlled by the change of prevailing wind system and monsoon, but also affected by geomorphology and lake land wind generated by lake effect and other factors. The influence of wind field on the Qinghai Lake sedimentary system embodies in the local area of dry and wet climate, source of supply, and degree of wave and the strength of the offshore current. The difference of dry and wet climate in local region results in the difference of vegetation coverage and the difference of weathering resistance. The weak weathering resistance zones provide ample source for sand accumulation. The waves and offshore current resulting from prevailing wind direction strengthen the transport and transform function for sand body.