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This invention relates to the field of touch detection circuit technology, and more particularly to a high-sensitivity touch detection circuit, comprising: a touch analog circuit, a touch digital circuit, and a CPU processor. The touch digital circuit includes a counter circuit, a latch circuit, a subtractor circuit, and a comparator circuit. This invention uses a simple digital detection circuit to detect touch events and reduces false alarms or missed detections by comparing with a configured threshold, making the touch detection circuit more reliable and meeting the higher requirements of next-generation MCUs for touch detection. It can be applied in MCU systems, suitable for 32-bit and 8-bit MCU series products. Charge is transferred from on-chip I / O capacitors to on-chip capacitors. When a touch action occurs, the capacitance for charge transfer increases, leading to a decrease in the number of transfers. The digital circuit determines whether a touch event has occurred by detecting the number of transfers.