Double-entry precision high-temperature oven for industrial and mining enterprises, laboratories, scientific research units for drying, baking, melting wax, sterilization, etc. Four independent temperature control test boxes use four control systems to independently control the temperature system of each test box body, which facilitates the comparison between specimens. The equipment also has the characteristics of space saving and cost saving. This equipment is generally used in electronic products and materials, batteries, batteries, plastic products, metal materials, auto parts, aerospace, university scientific research, etc.