Infinite groove cutting torch device

The utility model relates to the technical field of cutting torch cutting, in particular to an infinite groove cutting torch device which solves the problems that in the prior art, a cutting torch opening deviates from an original cutting line, meanwhile, the height of the cutting torch opening relative to a plate is changed, and therefore a numerical control system becomes complex, the control difficulty is large, and the cost is high. An infinite groove cutting torch device comprises an installation rack, a servo motor for providing rotating force is installed on one side of the installationrack, a parallel hinge four-connecting-rod mechanism used for transmission is arranged at the output end of the servo motor, a cutting torch cutting head for cutting workpieces is arranged on one side of the parallel hinge four-connecting-rod mechanism, and a cable is installed at the top of the cutting torch cutting head. The numerical control cutting device is simple in principle, convenient tomanufacture and reliable