DeviceNet is a fieldbus standard applied to equipment automation technology,which has the char-acteristics of simplicity,openness and low cost.This paper mainly introduces the wiring and communication characteristics of DeviceNet communication,and on this basis,analyzes the causes and treatment methods of communication interference,and points out that correct cable selection,good grounding design,stable power supply and effective interference prevention measures are the key to ensure the stable operation of De-viceNet communication network.