Digital display program controller, accurate temperature control, 30 segments of temperature control program can be set; The heating element is silicon molybdenum rod which has good temperature resistance, strong oxidation resistance and long service life; Stainless steel inner door liner, easy to clean; Ceramic fiber chamber, which has the characteristics of light weight, fast heating, low energy consumption and good heat insulation; Splicing structure chamber, which is convenient for maintenance; The insulation layer adopts ceramic fiberboard; With a group of current and voltage display instrument; Reinforced hinge and adjustable locking door buckle; The cooling fan prevents the circuit from overheating; Removable cover plate for replacing and maintaining the heating element; Whole chamber outer wall ventilation design, which can keep the shell within 40°C during working; Over current, over-voltage, leakage, short circuit, open door power off and other safety protections.