From the national collected data of lightning disasters from 1998 to 2009, the observational thunderstorm data of 18 meteorological stations, and lightning locating networks data and economy and population data in statistical yearbook of Hainan Province, the indices representing hazard-formative factor, hazard pregnant environment and hazard-affected body of lightning was selected. Through R-Cluster analysis, the indices influencing vulnerability were screened and checked. Based on 5 indices, i. e., thunderstorm days, lightning density above 50 kA, thunderstorm frequency, casualty frequency and regional vulnerability economic modulus as basic variables, similarity measures of samples were calculated. With Ward's method in Q-Cluster, the hierarchy cluster analysis was carried out and Q-iterative cluster was adopted to explain and testify the result of the cluster. Finally the zoning of lightning risk in Hainan Island was constructed. Results show that Haikou City is within the first category zone, whose vulnerability is extremely high, with comprehensive vulnerability as high as 3. 89; Wencang, Chenmai, Linggao, Dingan, Tuncang and Qionghai are in the second category zone, whose vulnerability is just next to the extremely high zones; Danzhou, Qiongzhong, Baisha, Tongshi, Baoting are in the third category zone with moderate risks; Changjiang, Dongfang, Ledong,Wannin, Lingshui and Sanya are in the fourth category zone with weak risks.

Basing the lightning risk business systems of Hainan,east longitude 110.367 and degrees north latitude 18.8 degrees of Wanning city urban were selected as reference points.Using Kriging method with 1km grid density,Month and year variation of thunderstorms were calculated and analyzed as well as daily variations in flash intensity and the distribution of lightning current.A number of lightning protection measures were put forward.

Statistics analysis 19 cities in Hainan of thunderstorm data,make use of a KRIGING interpolation method,compute an average thunderstorm day for any longitude and latitude degrees in Hainan,analysis two kinds of calculation methods for lightning average density,with the artificial of thunderstorm data and lightning position system the time limit of system data for the power weigh coefficient,calculation synthesize Ng value of risk assessment.As a result show that make use of time power weigh be worth for the zone of cycle time many index sign decision TOPSIS method,calculate synthesize lightning average density to be.feasible at lightning risk assessment.