Production raw material and preparation method of disc-shaped insulator with good insulating property

The invention provides a production raw material and a preparation method of a disc-shaped insulator with good insulating property, and relates to the technical field of power equipment. According to the production raw material and the preparation method of the disc-shaped insulator with good insulating property, a main body raw material of the disc-shaped insulator comprises the following raw materials in parts by mass: 15 to 25 parts of aluminum oxide, 10 to 15 parts of high-potassium feldspar, 40 to 60 parts of clay, 0.1 to 1 part of lanthanum oxide, 0.1 to 1 part of cerium sesquioxide, 0.1 to 0.88 part of praseodymium oxide, 15 to 18 parts of nacrite and 15 to 18 parts of garnet. A disc-shaped insulator main body glaze raw material comprises the following raw materials in parts by mass: 15-20 parts of quartz, 2-5 parts of talc, 18-27 parts of kaolin, 1-3 parts of copper oxide, 1-3 parts of ferric oxide and 0.1-1 part of rare earth oxide. The processed insulator can have good mechanical strength, meanwhile