Fastening device and system for train braking anti-slip

The utility model discloses a fastening device and system for train braking anti-slip, and the fastening device for train braking anti-slip comprises a hook, a tension collector, a box body, a rope, a reel, a ratchet wheel, a ratchet tongue, a ratchet tongue sliding groove, a relieving screw rod, an elastic part, a push rod, a first rotating shaft and a second rotating shaft. Two ends of the tension collector are respectively connected with the hook and the rope; the reel, the ratchet tongue sliding groove, the first rotating shaft and the second rotating shaft are fixedly connected with the box body, the first rotating shaft, the second rotating shaft and the reel are parallel to one another, and the ratchet wheel and the reel are coaxially fixed; the rope winds the reel; the ratchet tongue sleeves the first rotating shaft through the long hole; the lower end of the relieving screw abuts against the left end of the upper side face of the ratchet tongue, and the upper end of the relieving screw is in threaded