As the power supply core of a system, power supply systems often have to deal with all kinds of noise interference and electro-optical equipments have their own operation characteristics. How to take effective anti-interference measures to ensure equipments in stable and reliable operation state is worthy of discussion and study in-depth. From practical application, combined with the electric characteristics of electro-optical equipments and practical application effect of anti-interference measures, the key contents to be concerned about of transient interference suppression measures of the power supply systems of electro-optical equipments are described.