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There are three steps to establish the visualization simulation platform of low-voltage power line carrier communication system. Firstly, we establish the MARLAB/Simulink simulation platform to simulate low-voltage power line carrier communication system. The simulation platform bases on the analysis of power line channel characteristics and take the multipath channel transmission model of M.Zimmermann and K.Dostert. Then, we actually measure a large of noise, and the collected data of noise is made of MAT file. We use the SIMULINK's From File model to set up the noise simulation model based on the analysis of noise characteristics. Lastly, through the parameters of channel and simulation are inputted in the designing GUI interface in order to control the process of system simulation, we realize the visualization of system simulation based on the object-oriented thought. Based on setting up the platform, it is proof that using the adaptive OFDM technology can overcome the frequency-selective fading characteristics of power line channel transmission, enhance the system's anti-interference capability and realize the reliable high-speed data communication.