【英文摘要】Using polar ionospheric convection data observed by SuperDARN, multi-wavelength auroral data at Chinese Zhongshan Station in Antarctica and conjugated Huanghe Station in the Arctic, particle precipitation and field data with DMSP, Cluster/DS satellites, we have studied dayside ionospheric convection and its connection with dayside magnetospheric dynamics (such as high latitude reconnection and FTEs), dayside ionospheric flow bursts and their related features of particle precipitation, the characteristics of the particle precipitation and the radar spectral width in the dayside sunward flow regions, the temporal and special characters of the high latitude reconnection closely related to sunward flow in the cusp, and have given a scheme to illustrate the linkage between the dayside ionopsheric flow burst and the high latitude reconnection when IMF strongly northward. This project found some clues for us to understand the dynamics of the solar wind-magnetospheric-ionospheric coupling.