A circuit for detecting a touch point location on a touch panel, a touch panel and a display device for improving the precision of touch point location on the touch panel are disclosed. The circuit for detecting a touch point location on a touch panel comprises: a sensing sub-circuit, an amplification sub-circuit connected to the sensing sub-circuit, an output sub-circuit connected to the amplification sub-circuit, a detection sub-circuit connected to the output sub-circuit, and a first touch drive electrode line. The sensing sub-circuit comprising a fixed capacitor, a variable capacitor, and a first switch transistor, wherein a gate terminal and a source terminal of the first switch transistor are connected to the first touch drive electrode line, a drain terminal of the first switch transistor is connected to a terminal of the fixed capacitor, a terminal of the variable capacitor is connected to the other terminal of the fixed capacitor, the other terminal of the variable capacitor is connected to a reference voltage, and the amplification sub-circuit is connected to the terminal of the fixed capacitor that is connected to the variable capacitor.