A temperature control device for an air compressor comprises the air compressor and a temperature control unit, wherein the temperature control unit is provided at least one heating unit at the position of a working chamber of the air compressor; the air compressor is provided with a heat insulating layer at the outer part of each heating device at the position of the working chamber; the temperature control unit comprises a temperature control switch which is arranged on an air compressor body and extends to the position of the working chamber; the inner end of the temperature control switch is connected to each heating device at the position of the working chamber through a signal connecting line; the outer end of the temperature control switch is connected to a power supply through a power connecting line. With the adoption of the temperature control device, the temperature in the working chamber of the air compressor can be controlled to be more than the dew point temperature of air all the time, so that the lubricating oil can be effectively avoided emulsifying, and as a result, the service life of the air compressor can be improved, and the running safety can be ensured.