Heat gun and control method thereof

The invention discloses a heat gun and a control method of the heat gun. The heat gun comprises a temperature detecting element (14) and a comparing element (21), wherein one end of the temperature detecting element (14) is connected to a DC power supply while the other end of the temperature detecting element (14) is connected to a capacitor (22) and a fixed resistor (23) which are connected in parallel; the comparing element (21) is provided with a first input port (4), a second input port (5) and an output port (6), the first input port (4) is used for detecting a voltage value from the capacitor (22) to the ground, the second input port (5) is used for detecting a voltage value from the fixed resistor (23) to the ground, and the comparing element (21) is used for comparing the voltagevalue of the first input port with the voltage value of the second input port in order to obtain a comparison signal to be output to a control circuit (3); and when the voltage value of the first input port is greater than th