The invention discloses an accurate-positioning far and near-end back release film-coated support conveying system and method. The system comprises an outer sheath catheter, a middle tube, a core tube, a near-end release device, a far-end release device and a control release device, wherein a middle cavity of the middle tube is used for the core tube to pass through, cavities at two sides are respectively used for a rear-end release drawing wire and a far-end release drawing wire to pass through; the outer sheath catheter sleeves the middle pipe and can slide along the middle pipe, and the tail end of the outer sheath catheter is provided with a first handle; the near and far-end release devices with the near and far-end release drawing wires are used for respective connection with the near end and the far end of a film-coated support when the film-coated support is installed; and the control release device controls the release sequences of the near and far-end release devices through effects applied to the near and far-end release drawing wires. The system can ensure fixed installation positions and accurate positioning of the far end and the near end when the film-coated support is installed and prevents axial shrinkage after the film-coated support is installed and obstruction of a branch blood vessel close to a far-end cut due to far-end release inaccuracy.