In order to improve the rapid response of the weapon and expand its battlefield apperception to increase the early-warning time, researches are made on the parallax rectification methods in air guiding of demostic air defense forces. According to the realization process of parallax rectification, studies are made on 4 methods, such as collimation position, indirect position, map position and satellite position. Moreover, the advantages and disadvantages of these methods are discussed from the perspective of facility degree, applying scope and measure precision. The research provides theory guidance for the parallax rectification in air information lead of weapon equipment, and also has an active significance to improve the precision of air guiding.