The invention relates to a vertical gravity conveying enforced cross-flow drying method and a device. The invention is suitable for removing surface moisture from particle materials by utilizing hot air in the industries of mine, building materials, metallurgy, ceramics, chemical engineering and the like, and is also suitable for removing moisture from particle materials by utilizing hot air in the industries of foodstuff and feedstuff. The invention has the following technical scheme: hot airflow suitable for the dried material temperature is enforced into a storehouse; under the positive action of the external pressure, the hot airflow penetrates through the voids among the granules and is discharged out of the storehouse; the hot airflow and the material contact each other and exchange heat when the hot airflow penetrates through the voids among the granules; thus, the material temperature is increased, the moisture is evaporated, and the generated water vapor is discharged out of the storehouse along with the airflow; and under the action of gravity, the material on the same cross section in the drying storehouse continuously descends, and is continuously penetrated through and dried by the hot air in the descending process. Due to the adoption of the vertical gravity descending conveying, the invention is simple and reliable in structure; due to the adoption of the drum suction mode with multiple sets of positive pressure chambers and negative pressure chambers which are vertically arranged, the invention strengthens the airflow penetration capability, so that the airflow completely penetrates through the material, thereby enhancing the thermal efficiency; the flaky pastry mode increases the flow penetration drying area and enhances the yield; and since the material is dried in the descending process, the invention has the advantages of small disturbance, little exhaust dust and low pollution.