Abstract: Under the combined influence of the weakened low-pressure circulation of No. 2305 Super Typhoon Doksuri and cold air, from July 28, 2023, the Haihe River Basin was flooded with heavy to very heavy rainfalls, with exceptionally heavy rainfalls in some places. This resulted in Haihe "23·7" basin-wide extreme flood. A total of 8 flood storage areas were activated in the Haihe River Basin during this flood. Based on multi-temporal optical and radar remote sensing data, a remote sensing monitoring and analysis of the entire flood inundation process in the activated flood storage areas was carried out, and the extent and area of the inundated water bodies under the different processes of "activation-inundation-maximum inundation-flood subsided-flood subsided totally " in the eight flood storage areas were obtained. It provides real and reliable scientific data support for the dynamic mastery of the flooding situation in the flood storage area and the simulation analysis of flooding evolution and water conservancy projects scheduling.