The invention discloses an arbidol dry suspension and a preparation method thereof, and belongs to the medical industry. The arbidol dry suspension comprises Arbidol hydrochloride, a suspending aid, a diluent, a lubricating agent, a flavoring agent and a pH regulator, wherein the suspending aid is one or more of Arabic gum, tragacanth, sodium alga acid, povidone, hydroxy propyl cellulose and xanthan gum; the diluent is saccharose, mannitol and microcrystalline cellulose; the lubricating agent is lauryl sodium sulfate and sodium lauryl sulphate; the flavoring agent comprises a sweetener and an aromatizer, the sweetener is mannitol, saccharose, sodium cyclamate and aspartame, and the aromatizer is orange essence, banana essence, strawberry essence, and pineapple essence; and the pH regulator is citric acid and tartaric acid. The preparation method comprises the following steps of: sieving the arbidol hydrochloride, and respectively crushing and sieving the suspending aid, the diluent, and the lubricating agent; fully mixing the components except the diluent, and then adding the diluent for uniform mixing; and wetting by using ethanol to prepare a soft material, drying, and packaging into an aluminum-plastic composite membrane bag. After the arbidol is prepared into the dry suspension, the bitter of the arbidol is effectively masked, and the compliance of the patient is greatly improved.