In 2023，the average summer precipitation in Shandong was 414. 4 mm，which is 1. 0% less than that in normal years. The number of precipitation processes is less , and the more precipitation is mainly caused by Typhoon Doksuri．If the typhoon precipitation is removed，the summer precipitation in Shandong would be 15.9% less than that in normal years．In summer, the western section of the western Pacific subtropical high lay southward and the water vapour transport conditions were poor, accompanied with the height field positively over Lake Baika and southern weaker cold air, which was the direct reason for the less summer precipitation after excluding typhoon-induced precipitation．In addition, the abnormally cold sea surface temperature in the western Pacific Ocean causes the position of the Walker Circulation to change and the abnormal strengthening of its downward branch in early onset El Ni?o year. It also causes the Hadley Circulation to weaken and move southward, and the Ferrel Circulation to strengthen. This causes the western Pacific subtropical high to move southward and abnormal downward air currents to prevail over Shandong, making summer precipitation less likely.