Abstract: A system for securing large, heavy cylindrical cotton bales on a trailer, the system using front and rear support frames reversibly attached to a trailer bed with a plurality of spaced apart middle support frames therebetween. The middle support frame consists of a top frame and a bottom frame wherein the bottom frame is reversibly attached to the trailer bed. The top and bottom frames are connected to each other with a vertical side beam and with spaced apart angled beams. The front end and rear ends of the top frame are connected to each other with top cross beams. The spaced apart angled beams form retaining spaces causing at least some of the surface of a bale to become embedded in the retaining spaces, thereby preventing sideways, forward and backward movement of the bale. A retaining bar attached rotatably to the vertical side beams also prevents sideways movement.