A pixel circuit and a driving method thereof, as well as a display device. The pixel circuit includes an initialization signal terminal, a scanning signal terminal, a data signal terminal, a first power supply terminal, a second power supply terminal, a reference voltage terminal a light-emitting signal control terminal, a reset signal terminal, a data writing sub-circuit, a threshold compensation sub-circuit, a light-emitting control sub-circuit, a reset sub-circuit, a storage capacitor, a driver transistor and a light-emitting element. The threshold compensation sub-circuit is configured to pre-store the threshold voltage of the driver transistor in the storage capacitor.