The invention discloses a temperature control system of a chick incubator based on a current adjustable driving circuit. The temperature control system is characterized by mainly comprising a temperature sensor WQ, a diode rectifier U1, a polar capacitor C5, the current adjustable driving circuit, a switching control circuit which is connected with the cathode output end of the diode rectifier U1 and an N pole of a Zener diode D6, and a temperature detection processing circuit connected with the temperature sensor WQ and the switching control circuit. The temperature control system can filter electromagnetic interference waves in voltage signals output by the temperature sensor WQ, so that the voltage signals are more accurate; and rapid heating and heat radiation of the incubator can be realized, the accuracy of incubation temperature control of the chick incubator is ensured, the temperature stability of the incubator is ensured effectively, the death rate of chick embryos in eggs is reduced effectively, and the incubation rate of eggs is improved greatly.