Anti-warping printed circuit board

The utility model provides an anti-warping printed circuit board. The anti-warping printed circuit board comprises a plurality of working boards, the plurality of working boards comprise a plurality of working board surface layers which are symmetrical pairwise, each working board comprises a process frame and a plurality of board groups, each board group comprises a board group frame and at least two unit boards, and at least one process frame is provided with a frame optimization structure. Or at least one plate group frame is provided with a frame optimization structure, or at least one process frame and at least one plate group frame are provided with frame optimization structures, so that the residual copper rate difference value between every two symmetrical working plate surface layers is smaller than or equal to 10%. According to the utility model, based on the characteristics of the printed circuit board and the characteristics influencing the bending, the internal stress of the board is eliminated t