The invention discloses a cable dividing mechanism convenient for feeding of flexible flat cables. The cable dividing mechanism comprises a support and a motor and is characterized in that the lateral side of the support is provided with the motor; two fixed plates are arranged in the support; a lower rotating shaft penetrates the two fixed plates; an output shaft of the motor is connected with the lower rotating shaft; the upper portion of each fixed plate is provided with the opening which is used for placing a sliding plate; an upper rotating shaft penetrates the two sliding plates; a connecting plate is fixed at the tops of the two sliding plates; the top of the connecting plate is provided with a mobile shaft; two ends of the mobile shaft are connected with two connecting arms respectively; the top ends of the two connecting arms are fixed through a pin shaft; a handle can rotate around the pin shaft. According to the cable dividing mechanism convenient for feeding of the flexible flat cables, the problems that an upper cutting die and a lower cutting die of the cable dividing mechanism cannot move, the distance between the upper cutting die and the lower cutting die is small, the wiring time is long, the cabling error is easy to cause, and meanwhile plastic is easy to damage during wiring harness separation are solved, the wiring of the flexible flat cables is convenient and rapid, and abrasion and damage of the flexible flat cables cannot be caused.