Display panel, preparation method thereof and display device

The invention provides a display panel, a preparation method thereof and a display device, the display panel comprises a shielding line, at least part of the shielding line is arranged between two adjacent sub-pixel areas, a common electrode and the shielding line are connected with a common voltage end, and the common voltage end is configured to provide common voltage for the common electrode and the shielding line. According to the display panel, the preparation method thereof and the display device provided by the invention, the common electrode carrying the common voltage is arranged between the data line and the pixel electrode and continuously covers all sub-pixel areas of the display panel, so that electric field interference between the data line and the pixel electrode can be effectively inhibited. Meanwhile, the shielding lines carrying the common voltage are arranged between the adjacent sub-pixel areas, so that edge interference electric fields generated by the pixel electrodes in the sub-pixel areas to the adjacent sub-pixel areas can be effectively inhibited, the probability of poor color crossing of the display panel is effectively reduced, and the display quality is improved. And the display quality of the display panel, especially the display panel adopting a narrow BM design, can be improved.