In this paper, we analyze the influences of the winter-spring snow (WSS) on summer rainfall in the basin of the Yangtze River using the daily snow depths of 72 weather stations in Qinghai Province and the Tibet Autono-mous Region. The variations of the atmospheric circles of the anomalous Tibetan WSS years are investigated. The impact mechanism is researched by using NCAR/NCEP data. The most obvious area where the Plateau snow influences on summer precipitation in China is the Yangtze River Basin. Much (little) summer rain occurs in the Middle and lower reaches of the Yangtze River, the Ⅱ and Ⅲ (Ⅰ and Ⅱ) types of Chinese summer rain usually occur following the rich (little) winter-spring snow. The difference in air temperature over the Plateau between the rich and little WSS years occur mainly in March and April. In the rich (little) Tibetan WSS, the air temperature is low (high) over East Asia and high (low) over the ocean to the south part of East Asia in late spring and early summer especially in April and May. Hence, the air temperature difference between land and ocean is low (high). This retards (accelerates) the onset of the East Asian summer monsoon and makes it weak (strong) to a certain degree in the rich (little) snow year. In the spring and summer of the rich (little) Tibetan WSS year, the lower (higher) surface heat (mainly sensible heat) weakens (strengthens) the ascending motion over the Plateau and strengthens (weakens) the ascending motion over the middle and lower area of the Yangtze River and the west Pacific Ocean to the south of Japan. This restrains (accelerates) the West Pacific Ocean sub-tropical high from moving to the north. As a result, there is much (little) rain in the middle and lower area of the Yangtze River.