The invention provides a low-voltage insulation sheath. The low-voltage insulation sheath comprises a clamping part and an operating part, wherein the clamping part is provided with a line through gap and a clamping cavity, the clamping cavity communicates with the line through gap, the clamping part is made of insulation material, and the operating part is connected with the clamping part so that the line through gap is opened or closed. With the adoption of the technical scheme, a metal contact is only needed to be stored in the low-voltage insulation sheath when live-line low-voltage operation is performed by a worker by arranging the special low-voltage insulation sheath, so that contact short-circuit among metal contacts can be effectively prevented, and the low-voltage insulation sheath has the advantages of time and labor saving and is easy to operate. The insulation property of the low-voltage insulation sheath can be ensured, and a potential risk is eliminated.