According to the requirement of improving the systematic operational capability after electronic air defense forces attach to air defense forces, the paper researches the combination of electronic air defense and fire air defense. The paper analyzes the concept, connotation and characteristics of the combination of electronic air defense and fire air defense, and puts forward five principles and its application essentials of the combination by electronic air defense and fire air defense. The results show that the analysis can provide reference for air defense force to carry out the operation of the combination by electronic air defense and fire air defense.