Complex wiring PCB (printed circuit board) with simple connection structure and preparation method thereof

The invention provides a preparation method of a complex wiring PCB (printed circuit board) with a simple connection structure. The preparation method comprises the steps of arranging programmable logic devices at parts where complex wiring of the PCB are designed, and realizing interconnection wires between adjacent chips through a characteristic of arbitrary internal interconnection between pins of the programmable logic devices. Meanwhile, the invention provides a complex wiring PCB with a simple connection structure, which comprises a plurality of chips and programmable logic devices arranged between adjacent chips. A pin of one of the adjacent chips is connected with an arbitrary pin of the programmable logic device through a connecting wire, and another arbitrary pin of the programmable logic device is connected with a pin of the other chip through a connecting wire. According to the invention, the completion rate of the complex wiring PCB can be improved within a limited number of layers, the number of layers of the PCB is effectively reduced, and the design difficulty and the design workload of the PCB are reduced.