Automatic temperature control preheating device for chemical instrument

A chemical instrument temperature control preheating device comprises a device front cover, an instrument panel and a device rear cover which are sequentially combined and connected from front to back, a front cover lens is embedded in the inner side of the device front cover, a device shell is arranged on the back face of the device front cover, the instrument panel is clamped in the device shell, an electric heating ring is arranged on one face of the device rear cover, and a temperature sensor is arranged on the inner side of the electric heating ring. The electric heating ring and the temperature sensor make contact with the back face of the instrument panel, a control switch, a display screen and a power box are arranged on the other face of the device rear cover, and the electric heating ring, the temperature sensor, the control switch and the display screen are electrically connected with the power box. According to the instrument panel, the connecting stability of the device rear cover and the device