In this paper, using ionosonde data in Urumqi, Lanzhou, Beijing, Changchun, Manzhouli, Chongqing and Hainan of China and Wakkanai, Akita, Kokubunji, Yamagawa and Okinawa of Japan and simultaneously observed data of the geomagnetism, cosmic rays, TECand ionosphere during the magnetic storm in 1983-1985, various variation of the occurrence rate of the particle Eare presented. These variations obviously are shown that:(1) The events of the particle Eoccur mainly during the main phase and expansive phase of the magnetic storm. The occurrence rate of the particle Ehas a close correlation with the magnetude of the decreasing of the equatorial ring current index (Dst-index), but is not connected with the magnetic storm's type (sudden-commencement or gradual-commencement).(2) The monthly variation of the occurrence rate of the particle Eis the most in the spring, little in the summer.(3) The diurnal variation of the occurrence rate of the particle Eis more at midnight than at earlier midnight.(4) TECalways sharply increases during the events of the particle E.(5) The maximum occurrence rate of the particle Eis above 30 degrees of the geomagnetic latitude in China, above 25 degrees of the geomagnetic latitude in Japan.In addition, it i5 supposed that the precipitation particle may be the main cause for theevents of the particle Ein the low-latitude region.