Pixel circuit, drive method thereof and display device

The invention provides a pixel circuit. A second transistor is connected between a control electrode of a drive transistor and a conducting electrode to form a diode-connected topological structure. By means of the circuit structure and a storage capacitor, during current row gating, a threshold voltage of the drive transistor and data voltage information relative to gray are extracted and stored on the storage capacitor, the threshold voltage of the drive transistor is compensated, and the contrast ratio of a display is increased. The invention further discloses a drive method of the pixel circuit and a display device.