The Beijing Huayun Oriental Detection Technology Co., Ltd. established the DDW1 Lightning Location System in Guangdong Province from 2016 to 2018. The observation of a thunderstorm process by the DDW1 Lightning Location System shows that the spatial distribution of DDW1 location data is in good agreement with the strong echo areas of radar echoes. In this paper, the performance of the DDW1 lightning location system is analyzed by means of the data from the lightningtriggering experiment and the fullflash location data obtained by the Chinese Academy of Meteorological Sciences in Conghua of Guangzhou in 2018, and the detection efficiency and location accuracy of full flashes are verified. The results show that the detection efficiency of the DDW1 lightning location system is 100% for all the six triggered lightning events, and 17 times for the 27 triggered lightning events; the detection efficiency of the DDW1 lightning location system is about 63%. The average positioning error of these return stroke processes is about 464 m; the current inversion error is 11.49%; and the total flash detection efficiency is 50% compared with the highprecision fullflash detection network LFEDA.