On the basis of the observational data obtained by the Sine-Dutch Joint Leo
nids Observation Team at Delingha Station of Purple Mountain Observatory fr
om Nov. 13 to 18, 1998, and those obtained in other places of China during
the same period, the distribution characteristics of the 1998 Leonids are a
nalyzed and a three-layer structure of the meteoric shower encountered by t
he Earth is proposed.