The invention discloses a display module, a driving method thereof and a display device, which relate to the technical field of display, and aim to solve the problem that when a data signal line of adisplay product is used for providing a data signal, the target display brightness of the display product cannot be achieved due to relatively high MUX loss. Each signal input sub-circuit in the display module comprises at least two transistors, the control signal lines corresponding to the same signal input sub-circuit are used for loading the same control signal, the control signal lines corresponding to different signal input sub-circuits are used for loading different control signals, and the time periods where the effective levels of the different control signals are located are mutuallystaggered; the sum of the channel width-to-length ratios corresponding to the transistors in the at least two transistors is equal to a first preset value, and in the direction perpendicular to the substrate of the display module, the directly facing area between the grid electrode and the active layer of each transistor in the at least two transistors is smaller than a second preset value. The display module provided by the invention is used for displaying pictures.