An array substrate and manufacturing method thereof, and touch display device, the array substrate comprising a plurality of data lines, a plurality of gate lines (30) and a plurality of thin film transistors; the plurality of data lines and plurality of gate lines (30) are interleaved on different planes to divide the array substrate into a plurality of pixel units, each pixel unit being provided with thin film transistors; the array substrate further comprises a plurality of first touch sensing electrodes (10) and a plurality of second touch sensing electrodes (20); the first touch sensing electrodes (10) are disposed below the active region (40) of the thin film transistors, and serve as shielding metal layers blocking the light rays emitted by a backlight; and the first touch sensing electrodes (10) and the second touch sensing electrodes (20) are interleaved on different planes, and cross to form capacitors.
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