The invention relates to the technical field of leather cup packing fracturing pipe strings for preventing leather cups from being worn, in particular to a leather cup packing fracturing pipe string for preventing a leather cup from being worn. The leather cup packing fracturing pipe string comprises a connection oil pipe, an anchor device, a pressure relief isolating valve, a leather cup packer and a ball capture barrel, wherein the anchor device is fixedly installed on the connection oil pipe; the pressure relief isolating valve communicates with and is fixedly installed at the lower end of the connection oil pipe; the leather cup packer communicates with and is fixedly installed at the lower end of the pressure relief isolating valve; and the ball capture barrel communicates with and is fixedly installed at the lower end of the leather cup packer. The leather cup packing fracturing pipe string is reasonable and compact in structure and convenient to use, while the pipe string is downwards fed, a pressure relief channel is formed by fracturing side holes, a fracturing fluid delivery channel and pressure relief holes, and damping pressure in the downward feeding process is eliminated; the leather cup portion of the leather cup packer cannot be expanded, so that a reasonable movement gap is maintained between the leather cup portion of the leather cup packer and the inner wall of a casing pipe all the time, wear is avoided, sealing reliability of the leather cup packer is improved, and a seat packer is prevented from failing.