The utility model discloses a rack for airing a culture dish in a laboratory. Including a base, a plurality of fixing rods are movably arranged at the bottom end of the base through rotating shafts; limiting blocks are fixedly arranged at the positions, on one sides of the fixing rods, of the bottom end of the base. A supporting column is fixedly arranged at the top end of the base. A plurality ofairing discs are fixedly arranged at the top end of the supporting column. The airing disc comprises a fixed bottom plate, an upper fixed column, a lower fixed column and a movable hinge; the upper fixed column is fixedly arranged at the top end of the fixed bottom plate; the lower fixing column is fixedly arranged at the bottom end of the fixing bottom plate, a clamping groove is formed in the bottom end of the lower fixing column, a plurality of movable hinges are movably arranged on the outer side of the fixing bottom plate through rotating shafts, a plurality of air holes are formed in the fixing bottom plate and the movable hinges, and the top end of the supporting column is movably arranged in the clamping groove. The culture dish rack is simple in structure, convenient to assembleand disassemble and convenient to store, and culture dishes are convenient to air.