The offing typhoon in west of 130°E and major flooding events in Shaanxi during the past 35 years (1970-2004) were analytically studied by applying methods of statistics, synoptic, satellite cloud image analysis and physical diagnosis. Results show that the correlation is close to 90%. Major flooding events are concentrated in July and August, occupying nearly 88% of the total. When a typhoon originates in 130°E or moves westwards from the West Pacific across 130°E, it has more obvious influences on major flooding events in Shaanxi. The required water vapor and energy are transited through easterly winds around the typhoon center, especially in 850 hPa level. The offing typhoon provides necessary water vapor and energy to the occurrence and enhancement of floodcausing torrential rain in Shaanxi, and typhoon influence is an important factor to induce major flooding events in Shaanxi.