Openable suspender anchor box with external arch rib

The invention relates to an externally-arranged arch rib type openable suspender anchor box which comprises an arch rib, a steel pipe arch stiffening plate is arranged on the lower edge of the top of the arch rib, a leveling box is fixedly arranged on the upper portion of the steel pipe arch stiffening plate, an anchor bearing plate is fixedly arranged on the surface of the upper portion of the leveling box, and a suspender connecting hole is formed in the middle of the anchor bearing plate. The suspender anchor box is arranged in the suspender connecting hole, a leveling box stiffening plate is arranged between the leveling box and the suspender connecting hole, an anchor box side plate and a suspender anchorage device are arranged on the upper portion of the anchor bearing plate, and an anchor box cover plate is fixedly arranged on the top of the anchor box side plate. High-altitude cutting operation is avoided, meanwhile, the replacement difficulty of the suspender is lowered, and the working efficiency an