The invention discloses a flat drag chain for cable traction. A plurality of drag chain joints are included and connected in an end-to-end manner into a drag chain with a certain length. Each drag chain joint comprises connecting plates, a bottom plate and stop sheets, wherein the two connecting plates are arranged and fixedly connected to the two symmetric ends of the bottom plate in parallel; each connecting plate is connected with the corresponding stop sheet; the stop sheets on the two connecting plates are oppositely arranged, and an open annular cable containing space is formed by the stop sheets, the bottom plate and the connecting plates. Through the improvement design on the drag chain joint structure, rapid mounting and dismounting between the drag chain joints can be achieved, acable can be conveniently arranged in the drag chain o be used, the drag chain can be rapidly and integrally detached for cable replacement, dismounting, mounting and the like, the drag chain mounting and using efficiency is greatly improved, and adaptation to the industry high-speed progress is achieved.