Winding tube made of insulating materials and magnetic element with winding tube

The utility model relates to a winding tube made of insulating materials. The winding tube comprises a columnar winding core part, a base flange part and a middle flange part, wherein the base flange part is formed in the mode that the installation end face of the winding core part extends to the outer side in the diameter direction of the winding core part, and the middle flange part is formed in the mode of extending to the outer side in the diameter direction of the cross section parallel to the base flange part. The winding core part comprises a first winding core part body and a second winding core part body, wherein the first winding core part body is located between the middle flange part and the base flange part, and the second winding core part body is located on the side opposite to the first winding core part body relative to the middle flange part. The winding tube is characterized in that the diameter of the first winding core part body is larger than that of the second winding core part body. The winding tube is simple in structure, easy to manufacture and suitable for manufacturing a high-voltage resistant magnetic element.