Abstract: A real time monitoring system for Liquid Composites Molding (LCM) process based on the direct current principle was established to improve quality stability of products and make the process cost-efficient . The experiments indicate that the monitoring system can precisely reflect the resin flow f ront arrival and curing course of resinon the inspecting spot . The main process factorsp effect s on the monitoring signal were studied. The experimentalresult s show that different resin systems have distinct responses to the monitoring signal. The monitoring saturationvalue increases with the increase of temperature and the brass wirespbare length respectively. The f iber volume fraction and laying angle of f ibers have neglectable effects on the monitoring signal .