Flexible trailer skeleton for transport automobile

The utility model discloses a flexible trailer skeleton for a transport automobile. The flexible trailer skeleton comprises a main cross beam, and fixed cross beams vertically connected with the main cross beam in an inserting way, wherein a plurality of pin holes are uniformly distributed on the fixed cross beams; the main cross beam is fixedly connected with the fixed cross beams through the pin holes and spiral pins on the fixed cross beams; the main cross beam comprises cross beams arranged in parallel and connecting bodies vertically connected with the cross beams in an inserting way; a plurality of pin holes are formed longitudinally at two ends of the cross beams; the cross beams are fixedly connected with the connecting bodies through the pin holes and spiral pins on the cross beams; and movable pulley brackets and movable pulleys are arranged on the cross beams. The flexible trailer skeleton reduces the troubles of going up and down a machine tool when a whole automobile is processed by five axis, sh