Using Somat eDAQ data acquisition system acquired parts of load spectrum of a domestic car in Tong county proving ground and Xiangfan proving ground. The Ncode-GlyphyWorks software was applied for load spectrum data processing by according to statistics law,the time series were transformed into the rain flow matrix. The potential damage was showed in the form of percentage data in the form of data. The equivalent of two relations were gotten by Using road-related technologies and rain flow counting proving ground part of the road,which could provide evidence for automobile reliability test.