Based on the lightning location detection (DF) data, Doppler radar data and synoptic information, this paper presents the lightning characteristics of a typical mesoscale convective system in the north of Shandong province on August 1st, 2005. It is found that negative lightning (-CG) is predominant over positive lightning (+CG) during the whole thunderstorm lifetime. The maximum flash rate is 260 flashes per five minutes. The comparison of location of lightning and radar echo shows that –CG usually concentrates in the intense echo region with high reflectivity （>40dBz ）, while +CG usually disperses in the weak echo such as stratiform region or cloud anvil. The lightning flash changes with different echo, the maximum lightning flash rate occurred in the echo area within 45-55dBz. A good correlation between the cloud height of 30dBz and lightning flash rate is observed and the exponential relationship between them is proved.
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