Mask plate and preparation method thereof, display panel and preparation method thereof, and display device

The invention provides a mask plate (10) and a preparation method thereof, a display panel (40) and a preparation method thereof, and a display device, and relates to the technical field of display. A gap is formed between a first through hole (a1) formed in a first region (102b1) of the mask plate (10) and a second through hole (a2) formed in a second region (102b2) of the mask plate (10). Therefore, gaps exist among the plurality of cathode patterns in the display panel (40) prepared by adopting the mask plate (10), the transmittance of the display panel (40) is relatively high, and the imaging effect of a camera is relatively good. Moreover, the shape of the second through hole (a2) is a centrosymmetric pattern or an axisymmetric pattern, so that the net stretching device can obtain the position information of the second through hole (a2), and the mask main body (102) can be fixed on the mask frame (101) according to the position information of the second through hole (a2), thereby ensuring the net stretch