The invention relates to an anti-caking sand dryer, comprising a drying barrel, a controller, a sand incoming tube, a sand outgoing tube, a hot air tube and a plurality of support legs. A dischargingmechanism is arranged in the sand outgoing tube. A crushing mechanism and a filtering mechanism are arranged in the drying barrel; the crushing mechanism includes a first motor, a spindle, a rocking component and a plurality of crushing components; the filtering mechanism includes a strainer, a sealing component, support rods and a driving component. The anti-caking sand dryer has the advantages that blades are rotated and rocked through the crushing mechanism during drying, sandstone is cut and crushed at different parts, and drying effect being affected by moist sand caking is avoided; in addition, after drying, the strainer in the filtering mechanism is rotated down, a discharge plate in the sand outgoing tube is rotated down, sand in the drying barrel slips from the bottom, accumulation of fine sand, passing through the strainer, in the drying barrel is avoided, sand damage and dryer damage are avoided, and the dryer has improved practicality.