By analyzing the main functions， i.e.， data exchange and time synchronization of the switch in smart substations， the information model of switch intelligent electronic devices（IEDs） based on IEC 61850 standards is built. The information model consists of three logical devices（LD） such as: common LD， data exchange LD and time synchronization LD. Moreover， a new group of logical node class model is put forward in order to describe switch operation status and configurable parameters with different communication network protocols. Finally， several discussions are given for further modification of the proposed information model. supported by State Grid Corporation of China.