An automated tying tool includes slider, guide rail, first guide claw, second guide claw, frame, tensioning wheel, cutter, stepwise material feeding mechanism, and material pushing rod. First and second guide claws are mounted on frame via rotation of central pin. Cutter and tensioning wheel are mounted in frame. Guide rail is adjacent to frame. Slider engages with guide rail. An automated tying method includes: stepwise material feeding mechanism being loaded with ties, and conveying ties at fixed interval in each binding cycle; slider driving ties to slide from predetermined position to binding position; tie body of ties being curled in guide slots in first and second guide claws; causing tail portion of ties to pass through a hole at head portion of ties; tensioning wheel rotating to tighten ties; and cutter cutting tightened ties. A tying tool may include a material feeding, distributing, and pushing mechanism.