An exoskeleton robot comprises a waist assembly and a leg assembly. The waist assembly includes a first frame, a plate and a second frame. The first frame includes a rail and a slider inside the rail. The plate is fixed by a first bolt screwed into the slider. The second frame is connected to the plate. The second frame having a slot and a second bolt inside the slot. The leg assembly is installed to the second frame by the second bolt. By loosening the bolts, a user can move the leg assembly in two directions of the rail and the slot without the requirement for detaching the bolts.
