A method for preparing drug-loaded microspheres comprises: providing an emulsifier; adding an organic mixed solution in the emulsifier to form a mixed solution; performing a first stirring step, so that emulsion droplets are formed and dispersed in an aqueous phase of the mixed solution; performing a second stirring step, so that a part of an organic solvent in the mixed solution volatilizes and the emulsion droplets in the aqueous phase of the mixed solution are solidified into solids; performing a separation step to separate the solids from the aqueous phase of the mixed solution; performing at least one rinsing step to rinse the solids using deionized water; and drying microspheres to obtain white solid powder.
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