Porcelain insulator

The invention relates to a porcelain insulator which comprises a main porcelain body and umbrella leaves arranged at the periphery of the main porcelain body; and the umbrella blades are spirally continuous structures from one end of the main porcelain body to the other end of the main porcelain body. The porcelain insulator has the advantages: 'S'-shaped cracks, ring fractures, umbrella falling and other phenomena are not easy to generate under the action of dead-weight sagging force formed in an umbrella leaf manufacturing process, thereby problems caused by dead-weight sagging force concentration in manufacturing processes such as dry shrinkage, sintering and the like are solved; a trimming cutter does not need to retractably feed in a retractable manner in a forming and trimming process, thereby the realization of the purpose of continuous trimming is facilitated, the processing is convenient and the production efficiency is high; technical matters such as difficult glazing, non-uniform glazing, more retu