Die of hollow knob insulator

The utility model discloses a die of a hollow knob insulator, which comprises a bottom board (1) and a fuse channel (2), wherein the fuse channel (2) is arranged at the center of the upper side of the bottom board (1), and a cylinder (3) sharing one circle center with the fuse channel is arranged on the outer circumference of the upper side of the bottom board (1). As the cylinder sharing one circle center with the fuse channel is directly arranged on the bottom board, after porcelain powder is injected into the die, the knob insulator is directly generated, and after the manufacture of the knob insulator is completed, the die is not required to be taken out from the knob insulator, so that the uniformity of the shape of the knob insulator is guaranteed; in addition, as the process of manufacturing a copper die is omited, the cost is saved; and the die is simple in structure, convenient to manufacture, low in cost, and beneficial to large-scale popularization.