Portable insulating sheath

A portable insulating sheath relates to the technical field of insulating sheaths, a wire clamp body (2) is cylindrical, the outer side of the wire clamp body (2) is sleeved with a rubber insulating layer (1), the bottom of the wire clamp body (2) is folded towards the inside of the wire clamp body (2) through a bending part (6) to be provided with a wire clamp (3), and the end part of the wire clamp (3) is provided with a secondary folding clamp (4) far away from the center of the wire clamp body (2). A clamping ring (5) protruding towards the center of the wire clamp body (2) is formed at the connecting position of the wire clamps (3) and the secondary folding clamp (4), the clamping ring (5) is used for clamping a damaged power transmission line head, and the number of the wire clamps (3) is more than two. The method has the advantages that phase sequence errors and interphase short circuits can be effectively avoided, and habitual violation can be effectively avoided due to the fact that the method is eas