A sub-pixel circuit, a pixel circuit and a driving method thereof, a display module and a display device. The sub-pixel circuit comprises a data voltage writing circuit (11), a driving circuit (12), a storage circuit (13), a light emission time control circuit (14), a light emission control circuit (15) and a light emitting element; the light emission time control circuit (14) is used for writing, during a light emission time control phase, a light emission control signal into a control end of the light emission control circuit (15) under the control of the light emission time control end; the light-emitting control circuit (15) establishes, during a light emission time period included in the light emission time control phase, the connection between a second end of the driving circuit (12) and a first electrode of the light-emitting element under the control of the light emission control signal, so that the driving circuit (12) drives the light-emitting element to emit light according to a data voltage.