The present invention discloses a three-stage composition for preventing and controlling porcine respiratory diseases. The composition comprises a composition A used in weaning period of piglets, a composition B used in conservation period and a composition C used in fattening period. The composition A comprises fermented licorice extract, folium artemisiae argyi extract, loquat leaf extract, a coated tilmicosin phosphate preparation and zeolite powder; the composition B comprises echinacea purpurea extract and radix astragali extract; and the composition C comprises corns, soybean meal, wheat bran and homemade special premixes. In addition, the present invention also discloses an application of the three-stage composition used for preparing feed additives or feeds for preventing and controlling the porcine respiratory diseases. According to the occurrence regularity of the respiratory diseases of live pigs, the different compositions in the three stages are firstly used to prevent and control the occurrence of the porcine respiratory diseases. The three-stage composition is very ideal in effects, can effectively prevent and control the occurrence of the respiratory diseases and has the characteristics of being accurate in curative effects, not easy to produce drug resistance and relapse, etc.