The invention discloses a U-shaped pipe type rope saw cutting machine. The U-shaped pipe type rope saw cutting machine comprises a rope saw combination device and a fixing and motor combination device, wherein the rope saw combination device comprises a pipe type rope saw and a U-shaped wheel sliding fixing rod, and the pipe type rope saw is arranged on the U-shaped wheel sliding fixing rod in a sleeve mode and can freely slide along the U-shaped wheel sliding fixing rod; the fixing and motor combination device comprises a fixing plate, fixing supports and a double-head reciprocating motor, wherein the two fixing supports are arranged, are installed at the two ends of the fixing plate correspondingly, and the double-head reciprocating motor is fixed on the lower surface of the fixing plate; the two ends of the U-shaped wheel sliding fixing rod are connected with the fixing supports at the corresponding positions correspondingly; and the two side walls of the double-head reciprocating motor are both provided with motion sliding blocks, and the two ends of the pipe type rope saw are connected with the motion sliding blocks at the corresponding positions correspondingly. The U-shapedpipe type rope saw cutting machine has the characteristics that variable-direction cutting, different shapes cutting and internal cutting can be achieved; and meanwhile, the cutting effect is good, and the application prospect is good.