A flexible display panel, touch display module and display device are provided. The flexible display panel includes a display substrate and a spacer on a side of the display substrate away from a display side. The spacer includes a first side surface facing the display side of the display substrate and a second side surface away from the display side. The display substrate includes an arc surface region close to an edge and a panel bending pad bent to the side of the display substrate away from the display side and fixed on the second side surface of the spacer. Shape of the first side surface of the spacer is consistent with that of portion of the display substrate facing first side surface of the spacer. Portion of second side surface of the spacer corresponding to the arc surface region is a surface including a plane or multiple planes.