Abstract: Based on NCAR reanalysis monthly mean data and station precipitation data from 1951 to 2016, the relationship between polar vortex and South Asia High and its synergistic effect on precipitation in China are studied. The results show that the variations of the polar vortex and the South Asia High in summer, autumn and winter are basically the same. The quasi-9-year scale change occurs in summer, the quasi-8-year scale change occurs in autumn, and the quasi-4-year scale change occurs in winter. The correlation between polar vortex and South Asia High is the strongest in summer and the weakest in spring. The effect of them on precipitation in China is very significant. According to the posistive and negative standardised anomalies of the polar vortex and the South Asian High's area indices, four modes of positive-positive, positive-negative, positive-negative, positive-negative are defined as SS type, SW type, WS type, and WW type respenctively. Among them, SW type and WS type account for more, indicating that the simultaneous changes of the polar vortex and the South Asian High are negatively correlated more. In spring, polar vortex and the South Asia High affect precipitation mainly in Xinjiang and the Northeast Bohai Bay. The SS type and WS type correspond to the rain in the north, while the SW type and WW type are the opposite. In summer, the influenced areas are mainly in the northern plateau and the middle and lower reaches of the Yangtze River. Except for the SW type, the other three types correspond to the rainy areas in the middle and lower reaches of the Yangtze River; in autumn, the impact is mainly in Xinjiang, and the SS and WS types corresponde to more precipitaiton in the areas, and the SW and WW types are opposite; in winter, the impact is mainly from Xinjiang to the Yangtze River Delta, the SW type corresponds to rainy areas near 40°N, and the WW type corresponds to less rainy areas from northwest to southeast regions. In summer, the abnormality of the polar vortex and the South Asia High adjusts the configuration of the East Asian atmospheric cirulation, which has an impact on China's precipitation. In winter, SW type and WW type are consistent. SW type is rainy near 40°N, while WW type is less rainy from northwest to southeast of China. The anomalies of polar vortex and South Asia High affect the configuration of the general circulation in East Asia, and then affect the precipitation in China.