The utility model discloses a cross flow type food material drying device with a two-way current conversion function. The cross flow type food material drying device comprises a drying box and a hot air pipeline, wherein a drying chamber is arranged in the drying box, material storage guide grooves are symmetrically formed at the two sides of the drying chamber, a material disc is arranged on each material storage guide groove, the top and the bottom of the drying chamber are respectively provided with air distribution plates for forming an upper circulation air passage and a lower circulation air passage, one side of the drying chamber is provided with a separation plate for forming a hot air pipeline, a two-path reversing device is arranged in the hot air pipeline, the two-path reversing device is provided with two circulation air pipes respectively communicated with the upper circulation air passage and the lower circulation air passage, in addition, an air inlet pipe and an air return pipe are respectively adopted for respectively connecting an air inlet connecting opening and an air return connecting opening formed in the drying box, and the material disc is a cross flow type material disc with vent holes uniformly distributed at the bottom. The cross flow type food material drying device has the advantages that the two-path reversing device is arranged in the drying box, and in addition, the same executing mechanism is adopted for control in an integrated way, so that hot air passes through the air distribution plates with holes and the material disc from top to bottom in the drying box for cyclically drying the materials, the drying heat efficiency is high, and the quality is good.