The invention provides a method and device for establishing a PCB type prediction model and a PCB design. The method for establishing the PCB style prediction model comprises the following steps of acquiring a plurality of two-dimensional characteristic data of a PCB schematic diagram and presupposed type numbers of the PCB schematic diagram; training a neutral network model by using the two-dimensional characteristic data and the presupposed type numbers of the PCB schematic diagram as training datatill errors between the input data of the neutral network model and the presupposed type numbers of the PCB schematic diagram are smaller than the presupposed errors. The problems of low efficiency, long researching and developing periods and high costs of existing PCB design methods are solved.