A systematic study was carried out on paths and frequencies of typhoons affecting the coastal areas of Jiangsu and Zhejiang provinces. The results show that typhoons affecting the coastal areas of Jiangsu and Zhejiang provinces originate in the northwest Pacific and South China Sea, with more than 90% generated in the northwest Pacific. According to the extent of influence of typhoons on the coastal areas of Jiangsu and Zhejiang provinces, the paths of typhoons can be classified into three types, and their characteristics obtained. Typhoons land in the coastal areas of Jiangsu and Zhejiang provinces mainly from May to November each year, and the number of typhoons reaches its maximum in August. The significant period of typhoon frequency is five to six years. The number of typhoons and the accumulated cyclone energy have decreased since the 21st century. Typhoons along the coastal areas of Jiangsu and Zhejiang provinces are plentiful in the south and scarce in the north, typhoons land frequently in Zhejiang province and Shanghai City, and there is almost no typhoon landfall in Jiangsu province. Due to the influence of the special hydrological environment and terrain near Hangzhou Bay on the typhoon path, an area centered around Hangzhou Bay is a rare area without typhoons, where no typhoon was observed during the study period.