The invention discloses a capacitive touch display panel, a display device, a control device and a control method, which are used for solving the display and touch function of a display panel without additionally adding a touch panel, simplifying the structure of the capacitive touch display panel and increasing the light transmissivity. The capacitive touch display panel provided by the embodiment of the invention comprises an array substrate, a color film substrate and a liquid crystal layer which is positioned between the array substrate and the color film substrate, wherein the array substrate comprises a substrate, a polarizer, a BM (Black Matrix) and a TFT (Thin Film Transistor) functional unit, the array substrate is positioned at a light outlet side of the capacitive touch display panel, the color film substrate is positioned at a light inlet side of the capacitive touch display panel, the TET functional unit comprises a grid line, a data line and a TFT, the BM corresponds to the TFT, and projections of a grid electrode, a source electrode and a drain electrode of the TFT in a substrate direction are all projected in the BM.