A single-layer touch display panel and a device. The single-layer touch display panel includes a plurality of single-layer touch units and a plurality of display units. Each of the plurality of display units includes a red sub-pixel column, a green sub-pixel column and a blue sub-pixel column which are arranged side by side. Each of the plurality of single-layer touch units includes a transmitting electrode and a sensing electrode, which are adjacent to each other. Along a thickness direction of the single-layer touch display panel, an orthographic projection of each of the plurality of single-layer touch units respectively falls into an orthographic projection of one of the plurality of display units.