The present disclosure relates to the technical field of displays, and provides a pixel compensation circuit, which includes a detection circuit, a first compensation circuit, and a second compensation circuit. The detection circuit is configured to detect a threshold voltage of a driving transistor; the first compensation circuit being configured to write a first reference voltage to a source electrode of the driving transistor; the second compensation circuit being configured to write a second compensation voltage to a control terminal of the driving transistor at the same time of writing the first reference voltage to the source electrode of the driving transistor. The second compensation voltage is equal to a difference between the threshold of the driving transistor and a first compensation voltage.