Abstract: The chemical composition of 80 jet fuel samples was analysed by GC/MS, which is grouped into five categories of hydrocarbon compounds including n-paraffins, isoparaffins, cyclo paraffins, hydroaromatic and decalin. Several physical properties including density, flash point, freezing point, heating value and boiling range were measured by the standard ASTM methods. The database of compositionproperty relationship of the jet fuels was built up. The effect of chemical composition and boiling range on the physical properties was discussed. Combined with the Cookson′s models, 8 models were developed to predict the relationship of compositionproperties by multiple linear regressions (MLR), which gives a better prediction than the MLR correlations reported.