In order to enhance the merged application of multi-source lightning data in arid region, based on 3-dimension lightning location system (3-DLLS) data from Xinjiang Civil Aviation, world-wide lightning location network (WWLLN) data, advanced time of arrival and direction system (ADTD) data from meteorological departments and FY-4A lightning mapping imager (LMI) data, the detection efficiency of FY-4A LMI to 11 typical thunderstorm processes in Xinjiang in 2019 is preliminarily evaluated. Combined with FY-4A cloud top temperature (CTT) data, the characteristics of lightning are analyzed in detail during the severe thunderstorm process on 21 July 2019, and the relation between CTT and lightning activity is explored. The conclusions are as follows: (1) The amounts of FY-4A LMI group (LMIG) is about 1/5 of 3-DLLS, 1.02 times of WWLLN and 1/3 of ADTD. In the daytime, the detection efficiency of FY-4A LMI decreases under sunshine, even though the thunderstorm system strengthens after sunrise, the amounts of LMIG doesn’t increase. (2) During the thunderstorm process on 21 July 2019, the spatio-temporal distribution of 3-DLLS lightning has highly coincided with ADTD lighting, while that of WWLLN lightning has some deviations from 3-DLLS and ADTD lightning, which is mainly caused by different detection principles of various systems (WWLLN mainly detects strong cloud-to-ground lightning, ADTD mainly monitors lightning return stroke, and 3-DLLS detects total lightning) and the layout and number of measuring stations. (3) At different stages of the thunderstorm process on 21 July 2019, the values of FY-4A CTT in lightning occurrence areas are different greatly, and they are 260-280 K, 230-240 K and 240-260 K at the initial stage, mature stage and dissipating stage, respectively.