Abstract: Abstract There are too many meteorological disasters in Fujian Province, but the affected level are not same to agriculture, only through figuring the weight scientifically can to assess synthesis agro-meteorological disaster. How to confirm the weight of disasters is the main question issue in the agro-meteorological disaster integrative assess. The article introduce the traditional methods of the subjective and objective weighting method to calculate the main disasters weight including AHP、grey relational analysis and entropy weight method, comparing their reasonability, and a new combination weighting approach is further put forward which not only embodies the statistical information of sample involved，but also exploits the experience of experts. At last, the combinational weight of agro-meteorological disasters was got. The result showed that the weight calculated by combination weighting approach was more rational and reliable than both of the subjective weighting method and objective weighting method.