The present invention provides an inhalation-type pharmaceutical composition for Alzheimer's disease and preparation method thereof, comprising a first gas and an atomized medicine. The first gas comprises hydrogen. The gas volume concentration of hydrogen in the inhalation-type pharmaceutical composition is between 2 to 96%. The atomized medicine is selected from a group comprising rivastigmine hydrogen tartrate, donepezil hydrochloride, galantamine hydrobromide, memantine hydrochloride, and any combination thereof. The inhalation-type pharmaceutical composition of the present invention can provide the convenience of taking medicine and removing harmful radicals in the body of the patient through the use of hydrogen while also increases the absorption effect of the medicine for the patient by using an atomized medicine. At the same time, because the use of the small amount of the vaporized pharmaceutical liquid can indirectly reduce the side effects on the user.
