The present invention provides a display module and a display device. By disposing a second heat dissipation layer between a first heat dissipation layer and a first substrate, and connecting the first heat dissipation layer with the second heat dissipation layer, heat in a driving chip is transmitted to the second heat dissipation layer and then directly transmitted to the first heat dissipation layer, thereby the display module allows the heat to be quickly distributed throughout the panel and reducing the temperature in the areas corresponding to the driving chip. Therefore, the present invention solves the technical problem that areas corresponding to driving chips have higher temperature when current display modules are in operation.