The invention provides a pixel circuit which comprises two sub-pixel circuits. Each sub-pixel circuit comprises five switch units, a driving unit, an energy storage unit and an electroluminescence unit, and the first switch unit, the second switch unit and the fifth switch unit of the first sub-pixel circuit and the first switch unit, the second switch unit and the fifth switch unit of the second sub-pixel circuit share a scanning signal line. In the pixel circuit, working currents flowing through devices of the electroluminescence units are not influenced by the threshold voltage of corresponding driving transistors, and the problem that uneven display luminance is caused by threshold voltage drifting of the driving transistors is thoroughly solved. In the pixel circuit, driving of two pixels is completed through one compensating circuit, two adjacent pixels share a plurality of signal lines, the number of the signal lines, used in the pixel circuit, in the display device can be decreased, the cost of integration circuits can be reduced, the pixel distance can be decreased, and the pixel density can be increased.