Insulating protective sleeve for wire and cable head

The utility model discloses a wire and cable head insulation protective sleeve, comprising a fixing portion, the fixing portion comprises a fixing tube, the end portion of the fixing tube is provided with a conical locking end, the locking end is provided with an opening, and the locking end is screwed with a rotary sleeve; the movable part comprises a positioning sleeve and a movable pipe, the positioning sleeve is arranged outside the fixed pipe in a sleeving mode, and the positioning sleeve is arranged outside the movable pipe in a sleeving mode and detachably connected with the movable pipe. According to the invention, the rotary sleeve and the fixed pipe are arranged outside the cable sheath in a sleeving manner, the rotary sleeve is screwed at the locking end, the cable sheath is clamped by the locking end, the fixation of the fixed pipe and the cable sheath is completed, the movable pipe and the positioning sleeve are screwed, and under the action of the spring, the movable pipe is far away from the ro