The invention discloses a novel cable stripping knife, and relates to a cutter field. The novel cable stripping knife comprises a handle, a connecting rod, a sleeve, a first spring, a second spring, and an elastic lantern ring. The handle is connected with the sleeve by the connecting rod, and the top end of the sleeve is provided with an adjusting thread through hole. A height adjusting rod is disposed in the adjusting thread through hole, and the lower end of the height adjusting rod is detachably provided with a stripping blade. The bottom end of the sleeve is fixedly provided with a roller support, which is provided with a roller. The height adjustment is realized by arranging the sleeve and the height adjusting rod, and a requirement on stripping operation of cables having different specifications is satisfied, and by adopting the height adjustment, the stripping blade is used for cutting on proper positions, and the stripping can succeed once, and at the same time, metal cores in the cables are prevented from being cut by the stripping blade, and therefore use is convenient, and efficiency is high. The sleeve has a protection function, and therefore damages on operators during the stripping process are prevented. The novel cable stripping knife is used for the cable stripping.