The judgment method of the traditional electric contacts is mainly determined by control and detection of PLC to determine whether the value of specific voltage time bounds. For it is no reasonable use of the on-off time domain signal changes in the process of information, the type of contact failure can’t be reliably determined. In order to overcome this drawback, this paper uses the electric life testing platform developed by Holzer sensor and data acquisition card and other hardware in this paper, and through the on-off process of signal acquisition complete as the source, writes failure type identification algorithm for data processing and logical operation using the LabVIEW software. In experiment process, real-time monitoring of the plurality of contact parameters and automatic identification of failure types are achieved, and meanwhile comprehensive information of the contact failure is obtained. The experiment results show that the test results can achieve the expected results.