Manufacturing method of printed circuit board for signal generator

The invention discloses a manufacturing method of a printed circuit board for a signal generator, and the method comprises the following steps: manufacturing an inner-layer circuit on a core board, wherein a plurality of continuously bent U-shaped earthworm wires are inclined in the inner-layer circuit manufactured on one surface of the core board; pressing the core board and outer-layer copper foil into a production board through a prepreg; drilling holes at the positions, corresponding to the end parts of the earthworm lines, of the production board; metalizing the holes through copper deposition and full-board electroplating; and sequentially manufacturing an outer-layer circuit, manufacturing a solder mask layer, and carrying out surface treatment and forming on the production board toobtain the printed circuit board. The printed circuit board manufactured by the method provided by the invention can effectively reduce the loss of line signals and ensure the transmitting and receiving conversion efficiency