The invention relates to a pixel circuit, a driving method thereof and a display device, and the pixel circuit comprises a first output module which comprises a first output end and a second output end and is used for responding to a first data signal and selecting the first output end or the second output end to output a second data signal; The first selection control module is used for responding to the signal output by the first output end of the first output module and outputting a first selection control signal; The second selection control module is used for responding to the signal output by the second output end of the first output module and outputting a second selection control signal; The first selection module is used for responding to the first selection control signal and selectively outputting a first voltage signal or a second voltage signal to the first node; The second selection module is used for responding to the second selection control signal and selectively outputting a third voltage signal or a fourth voltage signal to a second node; And the third selection module is used for responding to the first data signal and selecting to output the voltage signal of the first node or the second node.