The invention relates to an inhalant used for inhibiting coronavirus, and a preparation method and application of the inhalant, and belongs to the technical field of pharmaceutical preparations. The inhalant comprises Remdesivir and/or a pharmaceutically acceptable salt thereof. According to the inhalant used for inhibiting the coronavirus, due to adoption of small-dose pulmonary administration,effective pulmonary administration concentration can be achieved when micronized or aerosolized Remdesivir is inhaled, the coronavirus, especially the novel coronavirus, can be effectively inhibited, the defects of a narrow treatment window and poor safety in the prior art are overcome, a small dosage is given for multiple times, so that the inhalant can be accumulated in the lung so as to form an effective virus inhibition effect, a curative effect can be improved or the dosage of the Remdesivir is reduced, and potential side effects are reduced.