Pixel circuit, driving method thereof and display device

The invention provides a pixel circuit, a driving method thereof and a display device, and belongs to the technical field of display. The pixel circuit comprises a first driving unit, a second driving unit and a light-emitting unit, wherein the first driving unit is connected with a scanning line, a data line, the second driving unit and the light-emitting unit, and is used for sending out a data signal input on the data line to the light-emitting unit under the control of a scanning signal input on the scanning line; the scanning signal and the data signal have opposite polarity; the second driving unit is connected with the scanning line, the data line and the light-emitting unit, and is used for sending out the scanning signal input on the scanning line to the light-emitting unit under the control of the data signal input on the data line.