An air pick driving device of a direct driving type reinforced soil nail comprises a connecting steel plate, two ends of the connecting steel plate are respectively welded with a steel pipe, a reinforced soil nail end is arranged in the steel pipe at one end, and an air pick with a flat head upsetting pick head is inserted in the steel pipe at the other end. During working, the reinforced soil nails are aligned to slope surface point locations of a slope; sleeving a steel pipe at one end of the connecting steel plate into the end of the reinforced soil nail; a flat-head upsetting pickaxe headof the air pick extends into the steel pipe at the other end of the connecting steel plate; and the air pick is started to send the reinforced soil nails into the soil body. The device has the advantages of being simple in structure, convenient to operate and low in cost. All the components can be machined and transformed on site for the reinforced soil nails with different diameters according tothe actual situation, and high adaptability is achieved. The operation is convenient, and the operation method can be mastered without professional educational training. And meanwhile, due to low cost, equipment and personnel are convenient to add, so that the construction progress is accelerated.