Ceramic closed constant temperature electric furnace

The utility model provides a ceramic closed constant temperature electric furnace, which comprises a control box, wherein a circuit board is arranged in the control box, four columns are erected on the control box, a lug boss is fixed on the columns, electric heating wires are distributed on the lug boss, a ceramic table-board covers the lug boss, and the periphery of the ceramic table-board and the bottom of the lug boss are clamped and closed by a metal plate, thereby the closed ceramic constant temperature electric furnace is formed. The electric heating wires are woven and wrapped by silicate fiber and then sintered at a high temperature to enable the silicate fiber to seal the electric heating wires. The lug boss arranged on the columns is the metal plate, and the plate is provided with anti-deformation square holes. The electric furnace has the advantages that the temperature is steady, and the error is minus/plus 2 degrees centigrade (DEG C); since the electric heating wires are woven and wrapped by si