In order to meet the needs of IFF(Identification Friend or Foe) of air targets in joint operations,an integrated method of IFF of air targets is proposed,which combines physical and tactical information.Firstly,the basic idea of this method is introduced by referring to the experience of the US military,and then the information fusion strategy is described.Based on this strategy,the homogeneous information fusion, heterogeneous information fusion and multi-period information　fusion of the method are modeled by using evidence theory and intuitionistic fuzzy sets.Finally,the reliability of the method is verified by case calculation and comparative analysis.