A pixel circuit, comprising a driving sub-circuit, a data writing sub-circuit, a threshold compensation sub-circuit, a storage sub-circuit, a light emitting control sub-circuit, a first initialization sub-circuit, and a second initialization sub-circuit. The data writing sub-circuit is configured to transmit a data signal provided by a data line to a third node under the control of a scan line. The threshold compensation sub-circuit is configured to turn on a first node and a second node under the control of the scan line, so as to write a threshold voltage of the driving sub-circuit into the storage sub-circuit. The light emitting control sub-circuit is configured to under the control of a light emitting control line, turn on a first power line and the second node, and turn on the third node and a fourth node. The first initialization sub-circuit is configured to turn on the first power line and the first node under the control of a reset line. The second initialization sub-circuit is configured to turn on a reference voltage line and the fourth node under the control of the reset line, and turn on the reference voltage line and the fourth node under the control of the scan line.