The invention provides a display panel and a manufacturing method thereof and a
display device, and relates to the technical field of display. An
electrode connecting layer, a flat layer, an
anode layer, a pixel defining layer, an organic functional layer and a
cathode layer are sequentially arranged on a substrate of a functional display area, the
electrode connecting layer comprises a pluralityof
anode connecting wires and
cathode connecting wires which are insulated from one another; the
anode layer comprises a plurality of anodes which are arranged at intervals, two adjacent anodes are connected with the anode connecting line through a first via hole penetrating through the flat layer, the
cathode layer comprises a plurality of cathodes which are arranged at intervals, and two adjacent cathodes are connected with the cathode connecting line through a second via hole penetrating through the pixel defining layer and the flat layer. Due to the fact that the number of film
layers of the function display area is small, the light
transmittance can be improved, due to the fact that the number of wires of the function display area is small and the anodes and the cathodes are distributed at intervals, the light transmitting area of the function display area can be increased, the
diffraction coherent superposition phenomenon is reduced, normal use of a function device is guaranteed,and full-screen display is achieved.