Thermal insulation pipe girdling device capable of preventing pipe orifice from being damaged

The utility model provides a thermal insulation pipe girdling device capable of preventing pipe orifice damage, and relates to the technical field of thermal insulation pipe cutting, the thermal insulation pipe girdling device comprises a base, one side of the top wall of the base is fixedly connected with a first support, one side of the surface wall of the first support is fixedly connected with two supporting shafts, and one side of the surface wall of each supporting shaft is provided with a protection device. Three rails are arranged on the top wall of the base, a lead screw motor is installed on one side of the surface wall of the base, a lead screw is installed and connected to the output end of the lead screw motor, a gear motor in the protection device is started by a user, the output end of the gear motor drives a first driving gear to rotate, and then a connecting plate and a protection plate are driven to move; the protection plate clamps the pipe opening of the thermal insulation pipe from the ou