Low-voltage power line carrier communication is widely used for smart metering equipment. It is necessary to set up the simulation platform of power line channel and test the communication performance, because of the bad communication condition seriously affect the stability of system. The design and implementation of the simulators of power line load, attenuation and noise are completed, based on the analysis of the low-voltage power line channel characteristics. On the basis of the eventual establishment of carrier communication test system of smart metering. The low voltage power line carrier communication performances were tested, and the measurement data and test results were analyzed. The establishment of the test system provides an effective method and base for communication performance evaluation and equipment selection.