Abstract: Data recorded by a GPS ionospheric scintillation monitor installed in Nanjing has been used to study the day-to-day, month-to-month, local time and special variation characteristics of L-band ionospheric amplitude scintillation during the period between November 2008 and October 2009, which lays the foundation for grasping disciplines of the ionospheric scintillation in future. The preliminary statistical analysis shows that the amplitude scintillations were quite quiet and the scintillation activities with S₄ > 0.2 occurred infrequently. Different intensities of amplitude scintillation have a common spatiotemporal variation characteristics. The occurrence rate in Jun., Aug., Sept. and Oct. is higher than that in other months, and the highest occurrence rate took place in October and the lowest in November. The occurrence rate in northern direction is higher than that in the southern direction. But the results are not approved fully. So it is necessary to analyze and certify them in future.