Abstract: Based on the daily precipitation and sunshine duration data of 78 stations in autumn over Guizhou during 1969-2019 and NCEP/NCAR reanalysis data in the same period,the frequency,duration,spatial and temporal distribution characteristics of continuous rain without sunshine were analyzed,with five typical processes selected for circulation diagnosis.The results showed that over the past 51 years,the average of the number（precipitation）in autumn rain day without sunshine was 27.3 d（183.2 mm） with the most in October（September and October） and the least in September（November）,showing the “more in the north and less in the south”pattern.The light continuous rainy days（5-6 days）occurred most frequently in the northeast of Guizhou,while the heavy ones（more than10 days）mainly appeared in the northwest of Guizhou.In the year of El Ni?o,the Indian Ocean dipole is in the positive phase,and the low-pressure system are frequent in the plateau and its west and Indian Ocean region. It is conducive to the emergence of continuous rain process in Guizhou province.