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The main contents of this paper are the collection of Acoustic Emission (AE) of grinding and the process of the AE signal. The AE signal data are collected real-time through AE sensor for on-line monitoring of grinding processes based on experiments. A vibrating sensor and DATAQ instruments are used to weaken vibration preliminary and to make the collection and the preserving of the RMS of AE on PC. The procession and analysis of process curve of each single workpiece in a production line of automotive components based on the elimination-anamnesis recursion method (EARM), which can monitor the grinding force online, and also can eliminate the interference and vibration, providing a more effective method for analyzing and processing grinding signal and optimizing the monitor of dressing processes.