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The physical layer is based on the network structure,which is responsible for the transmission and reception of the network signals.When the physical lay’s performance state has problems,it will seriously affect the communication quality of the network devices,and the fault points are difficult to be found out. According to the "《IEEE 802.3-2000 and ANSI X3.263-1995 standard》 this paper studies the test method of the consistency characteristic signal test of the physical layer of type 1000Base-T network interface,and designs a test method that can capture the specific characteristic signal accurately with the advanced trigger function of the digital oscilloscope.This method can satisfy the consistency test phase of the nerwork physical layer.