The invention discloses 
cyclosporin A pulmonary inhaled macroporous microspheres and a preparation method thereof. The 
cyclosporin A pulmonary inhaled macroporous microspheres consist of the following components in part by weight: 1 to 3 parts of 
cyclosporin A, 1 to 10 parts of 
chitosan derivative, 0.5 to 5 parts of beta-
cyclodextrin or a derivative thereof and 0.5 to 5 parts of porogen, and havethe particle size of 1 to 10mu m. The preparation method mainly comprises the steps of filtering and spray-
drying. The invention has the advantages that: the pulmonary inhaled microspheres have a macroporous structure, can be used for pulmonary administration, have the particle size of 1 to 10mu m, the 
medicine loading capacity of 5.28 to 7.28 percent, the encapsulating rate of 0.85 to 1.19 percent, and high 
biocompatibility, can reduce 
irritation of a 
respiratory mucosa, and is particularly suitable for a 
dry powder inhalant to fulfill the aim of pulmonary administration, the 
medicine is sustained-release, the using amount and side effects of the 
medicine can be reduced, the preparation method is easy and convenient to operate, the process is stable, and industrial production is easy to implement.