Box type electric furnace is a type of electric furnace. Using reliable integrated circuits, the working environment is good, anti-interference, and the furnace shell temperature is ≤ 50 ℃ at high temperatures, greatly improving the working environment. Microcomputer program control, programmable 2 sets of 16 segment curves, fully automatic heating/cooling, temperature control parameters and programs can be modified during operation, flexible and convenient, and easy to operate.