Compared with the development of software system, the hardware design and its optimization of electronics have seen the practical problems such as long time consumption and high cost. However, in the actual design, engineers tend to pay more attention to the highly principled issues but what lead to the great influence on the operation of printed circuit boards is just some detailed errors that we have to correct over and over. It's impossible for the perfect generation of PCBs but gradual optimization can be obtained. This passage will first list some problems on circuit design, PCB production and maintenance and then provide some easy to use methods to optimize custom PCB within limited cost.