Automatic nailing device

An automatic nailing device comprises a machine body, a conveying device, a positioning device and a nailing device. The conveying device comprises a transmission shaft and a conveying chain, the conveying chain is arranged on the transmission shaft, and the transmission shaft is arranged on the machine body. The positioning device comprises a supporting plate, a first cylinder, a fixed clamp, a movable clamp and a backup plate, wherein the supporting plate is vertical to the conveying direction of the conveying chain and is arranged on the machine body, the first cylinder is arranged above the supporting plate, the fixed clamp is arranged on the machine body on one side of the conveying device, the movable clamp and the fixed clamp are correspondingly arranged on the machine body on the other side of the conveying device, the movable clamp can move in the conveying direction of the conveying chain, and the backup plate is parallel with the conveying chain and is arranged on the machine body. The nailing device is arranged on the side where the fixed clamp is located and above the conveying device. According to the automatic nailing device, a floor can be automatically nailed, manual operations are replaced, production efficiency is greatly improved, and the automatic nailing device belongs to the technical field of floor production.