The invention provides an RFID product standing-wave ratio automatic testing system. The system comprises a plurality of mismatch loads which simulate different mismatch reflection conditions for the system, a network analyzer which is adopted as a standard instrument to calibrate the actual standing-wave ratio of each mismatch channel, a multi-channel switching unit which is connected with the plurality of mismatch loads and the network analyzer, provides a high-isolation radio frequency channel, and sets up mismatch loops corresponding to each mismatch load through connecting a computer, a server which records measurement configuration parameters of RFID products and saves testing results, and the computer which is connected with the server and the network analyzer, reads the measurement configuration parameters in the server, sets up mismatch loops for RFID product standing-wave ratio automatic testing through connecting the network analyzer and the multi-channel switching unit, and is suitable for performing automatic standing-wave ratio testing on RFID products connected with the system and transmitting testing results to the server for saving the testing results. According to the RFID product standing-wave ratio automatic testing system of the invention, an existing RFID product standing-wave ratio manual testing mode is computerized, and therefore, testing efficiency can be improved.