The invention discloses an antiswelling anticracking tundish dry working lining and a preparation method thereof. The tundish dry working lining comprises the following components in percentage by weight: 50-90% of magnesite sand with the particle size less than or equal to 5mm, 5-45% of magnesite or dolomite with the particle size less than or equal to 3mm, 0.1-2.5% of combustible fibers, 1.5-6.0% phenolic resin powder and 0.1-3.0% of a composite additive. The antiswelling anticracking tundish dry working lining disclosed by the invention has the advantages that swelling degree of the tundish dry working lining in baking and using processes is reduced, stress concentration and rigidity after curing of a lining material are reduced, oxidation time of a binding agent carbon net is delayed, cracking, steel drilling, caving and the like in the baking and using processes of the material are effectively prevented, and safety performance of a continuous casting tundish is greatly improved while excellent corrosion resistance and sintering resistance are maintained.