Abstract: Based on the daily temperature and precipitation data from 155 national meteorological stations in Sichuan province and NCEP/NCAR reanalysis data from 1961 to 2022,the characteristics of persistent high temperature and drought event during summer in 2022 and its mechanisms were analyzed.The results showed that the average temperature,maximum temperature and high-temperature days during summer in 2022 exceeded the maximum values of the historical corresponding period,with the value of 73.0% stations happened severe drought or above,implying a most serious high temperature and drought event since 1961.The direct reasons for this event were found that the enhancement and northward movement of the South Asia high（SAH） characterizing as jumping northward and advancing eastward,superimposed with the Tibetan high（TBH） at 500 hPa developing eastward or the western Pacific subtropical high（WPSH）strengthening to move northwestward,which finally formed a stable barotropic structure controlling the weather of SCP.In addition,the mid-latitude Asia prevailed zonal circulation,and the high pressure belt formed by the Iran high,TBH and WPSH prevailed sinking divergence air,which blocked the cold air from the mid-high latitudes moving southward as well as the warm moist air from the lower latitudes moving northward.This led to the decreased precipitation in SCP,resulting in a high temperature and drought event.