The invention provides a temperature control switching circuit which is used for controlling the working status of a cooling fan according to the environmental temperature to adjust the environmental temperature. The temperature control switching circuit comprises a three-terminal voltage stabilization module, a temperature induction module, a voltage division module and a switching module. The switching module comprises an electronic switch, a bias resistor and a positive feedback resistor. One end of the bias resistor is connected with the high-voltage terminal of the electronic switch. The other end of the bias resistor is connected with the control terminal of the electronic switch. One end of the positive feedback resistor is connected with the low-voltage end of the electronic switch. The other end of the positive feedback resistor is connected with the reference terminal of the three-terminal voltage stabilization module. The anode terminal of the three-terminal voltage stabilization module is grounded. The control terminal of the electronic switch is connected with the cathode electrode of the three-terminal voltage stabilization module. When the three-terminal voltage stabilization module is powered off, the electronic switch is powered off, and the fan does not work. When the three-terminal voltage stabilization module is powered on, the electronic switch is powered on, and the fan is controlled to work to conduct heat dissipation and cooling on the environment. The temperature control switching circuit can control the temperature without an integrated chip, and therefore the cost is low.