The present utility model relates to a box body structure of a draw-bar box and the draw-bar box. The draw-bar box comprises a box body and a telescopic draw bar. First extrusion-molded blocks are provided at four corners of an upper end of the box body, and second extrusion-molded blocks are provided at four corners of a lower end of the box body, the first and second extrusion-molded blocks respectively being in threaded connection with the box body. The first extrusion-molded block comprises a first outer corner protector located on the outside of the box body, and a first inner corner protector located on the inside of the box body and mating with the first outer corner protector, the first outer corner protector being in threaded connection with the first inner corner protector. The second extrusion-molded block comprises a second outer corner protector located on the outside of the box body, and a second inner corner protector located on the inside of the box body and mating with the second outer corner protector, the second outer corner protector being in threaded connection with the second inner corner protector. Rollers are provided on at least two of the second extrusion-molded blocks at the lower end of the box body. The present utility model has a simple structure, reasonable design and convenient use, and also has the advantages of low production costs, stronger firmness, and hardly deformed corners.