The application provides a position detection circuit, which is connected to a processing circuit (200), and includes a first switch module (110) and a first ground resistor (R1); the first switch module (110) includes a first end, a second end and a first switch (T1), the first switch module (110) is used for controlling on/off state of the first switch (T1) according to whether the placement member is placed at a first placement position, the first end of the first switch module (110) receives a system voltage (Vcc), and the second end outputs a first state signal or a second state signal to the processing circuit (200) according to the on/off state of the first switch (T1); and the first grounding resistor (R1) has a first end connected to the second end of the first switch module (110), and a second end grounded. Also provided is an electronic cigarette.